50 Higher-Order Thinking Skills (HOTS) MCQs (Level 3) on Electromagnetic Induction, Physics (Unit-Wise MCQs Practice):

👉Physics MCQs Hub – Unit wise Physics MCQs Practice (Main-Page)👈

Whether you are preparing for board examinations, chapter tests, college assessments, or competitive entrance exams (MDCAT, ECAT, NUST, PIEAS, GIKI, UET, FAST, and other engineering or medical admission tests), this comprehensive MCQ collection is designed to help you master Electromagnetic Induction. The questions are arranged progressively—from basic concepts to advanced numerical problems and higher-order thinking—providing complete and systematic exam preparation.

This chapter-wise MCQ collection includes:

100 Basic MCQs Level-1 (1–100) – Covering Faraday's Law, Lenz's Law, magnetic flux, induced EMF, Fleming's Right-Hand Rule, self-induction, mutual induction, transformers, AC generators, and fundamental concepts.

100 Advanced & Numerical MCQs (101–200) – Focusing on induced EMF calculations, motional EMF, transformer equations, efficiency, power transmission, magnetic flux, and practical numerical problems.

50 Higher-Order Thinking Skills (HOTS) MCQs (201–250) – Designed to strengthen conceptual understanding, analytical reasoning, and advanced problem-solving skills.

50 Challenging MCQs Quiz with Answers – A carefully selected mix of conceptual, numerical, and HOTS questions for quick revision, self-assessment, and complete exam preparation.

This MCQ collection covers:

Faraday's and Lenz's Laws
Magnetic flux and induced EMF
Motional EMF and Fleming's Right-Hand Rule
Self and mutual induction
Eddy currents and their applications
AC generators and alternating current
Transformers, efficiency, and power transmission
Practical applications of electromagnetic induction

Every MCQ includes the correct answer with a clear, concept-based explanation to strengthen understanding, improve problem-solving skills, and reinforce key physics concepts.

This question bank helps students to:

Build a strong conceptual foundation
Master electromagnetic induction and transformers
Improve numerical and analytical problem-solving skills
Strengthen conceptual understanding through HOTS questions
Avoid common examination mistakes
Increase speed, accuracy, and confidence
Prepare effectively for board and competitive entrance examinations

With 250 carefully selected MCQs organized into 100 Basic, 100 Advanced & Numerical, and 50 HOTS questions, plus a 50 Challenging MCQs Quiz, this all-in-one MCQ bank provides complete preparation for Electromagnetic Induction and serves as an excellent resource for both school and competitive physics examinations.

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Electromagnetic Induction MCQs Level 3 – 100 Higher-Order Thinking (HOTS) MCQs (201–300)

MCQ No. 201

A coil is moved into a uniform magnetic field with constant speed. The induced emf depends mainly on:
a. Mass of the coil
b. Rate of change of magnetic flux
c. Resistance of the wire
d. Area of the conductor only

Correct answer: b. Rate of change of magnetic flux

Explanation: According to Faraday's law, induced emf is directly proportional to the rate of change of magnetic flux through the coil.

MCQ No. 202

A circular coil rotates in a magnetic field. The induced emf becomes zero when the plane of the coil is:
a. Parallel to the magnetic field
b. Perpendicular to the magnetic field
c. At 45° to the magnetic field
d. At 60° to the magnetic field

Correct answer: b. Perpendicular to the magnetic field

Explanation: When the plane of the coil is perpendicular to the field, the flux is maximum but its rate of change is zero, so the induced emf is zero.

MCQ No. 203

If the number of turns of a rotating coil is doubled while other factors remain constant, the induced emf becomes:
a. Half
b. Double
c. Four times
d. Unchanged

Correct answer: b. Double

Explanation: Induced emf is directly proportional to the number of turns of the coil.

MCQ No. 204

Which quantity remains constant in an ideal transformer?
a. Voltage
b. Current
c. Frequency
d. Resistance

Correct answer: c. Frequency

Explanation: A transformer changes voltage and current but does not change the frequency of alternating current.

MCQ No. 205

When the resistance of an AC circuit increases while voltage remains constant, the current:
a. Increases
b. Decreases
c. Remains constant
d. Becomes zero

Correct answer: b. Decreases

Explanation: From Ohm's law, current is inversely proportional to resistance.

MCQ No. 206

At resonance in an RLC circuit:
a. XL > XC
b. XC > XL
c. XL = XC
d. Resistance becomes zero

Correct answer: c. XL = XC

Explanation: At resonance, inductive and capacitive reactances are equal, making the impedance minimum.

MCQ No. 207

The impedance of a series RLC circuit at resonance is:
a. Zero
b. Equal to resistance
c. Equal to reactance
d. Infinite

Correct answer: b. Equal to resistance

Explanation: At resonance, reactances cancel each other, leaving only the resistance.

MCQ No. 208

The current in a series RLC circuit at resonance is:
a. Minimum
b. Zero
c. Maximum
d. Half of maximum

Correct answer: c. Maximum

Explanation: Minimum impedance at resonance results in maximum current.

MCQ No. 209

If the magnetic field through a coil remains constant, the induced emf is:
a. Maximum
b. Minimum
c. Zero
d. Infinite

Correct answer: c. Zero

Explanation: A constant magnetic flux produces no induced emf.

MCQ No. 210

The direction of induced current can be determined by:
a. Fleming's Left-Hand Rule
b. Fleming's Right-Hand Rule
c. Ampere's Rule
d. Right-Hand Grip Rule

Correct answer: b. Fleming's Right-Hand Rule

Explanation: Fleming's Right-Hand Rule determines the direction of induced current in generators.

MCQ No. 211

A transformer increases voltage from 220 V to 2200 V. It is a:
a. Step-down transformer
b. Step-up transformer
c. Isolation transformer
d. Power supply

Correct answer: b. Step-up transformer

Explanation: Output voltage greater than input voltage indicates a step-up transformer.

MCQ No. 212

Which energy conversion occurs in an electric generator?
a. Electrical to Mechanical
b. Mechanical to Electrical
c. Chemical to Electrical
d. Heat to Electrical

Correct answer: b. Mechanical to Electrical

Explanation: A generator converts mechanical energy into electrical energy by electromagnetic induction.

MCQ No. 213

The induced emf in a generator is maximum when:
a. Angular speed is minimum
b. Angular speed is maximum
c. Coil is stationary
d. Magnetic field is zero

Correct answer: b. Angular speed is maximum

Explanation: Faster rotation increases the rate of change of magnetic flux.

MCQ No. 214

A coil moving parallel to magnetic field lines experiences:
a. Maximum induced emf
b. Zero induced emf
c. Constant emf
d. Increasing emf

Correct answer: b. Zero induced emf

Explanation: No magnetic field lines are cut when motion is parallel to the field.

MCQ No. 215

The average power consumed in a purely inductive AC circuit is:
a. Maximum
b. Equal to VI
c. Zero
d. Infinite

Correct answer: c. Zero

Explanation: In a pure inductor, voltage and current differ by 90°, so the average power over one cycle is zero.

MCQ No. 216

The average power consumed in a purely capacitive circuit is:
a. Zero
b. Maximum
c. Equal to VI
d. Equal to V²/R

Correct answer: a. Zero

Explanation: A pure capacitor stores and returns energy without consuming average power.

MCQ No. 217

The power factor of a purely resistive circuit is:
a. 0
b. 0.5
c. 1
d. 2

Correct answer: c. 1

Explanation: Current and voltage are in phase, so cos 0° = 1.

MCQ No. 218

If the power factor of an AC circuit is zero, the circuit is:
a. Purely resistive
b. Purely inductive or purely capacitive
c. Combination of R and L
d. Combination of R and C

Correct answer: b. Purely inductive or purely capacitive

Explanation: A phase angle of 90° gives a power factor of zero.

MCQ No. 219

The primary purpose of laminating the iron core of a transformer is to:
a. Increase resistance
b. Reduce eddy current losses
c. Increase voltage
d. Increase current

Correct answer: b. Reduce eddy current losses

Explanation: Thin insulated laminations reduce circulating eddy currents and minimize heating.

MCQ No. 220

The iron core of a transformer is made of soft iron because it has:
a. High retentivity
b. High coercivity
c. Low hysteresis loss
d. High resistance

Correct answer: c. Low hysteresis loss

Explanation: Soft iron is easily magnetized and demagnetized, reducing energy loss.

MCQ No. 221

Which of the following devices works on mutual induction?
a. Transformer
b. Electric bell
c. Voltmeter
d. Galvanometer

Correct answer: a. Transformer

Explanation: A transformer operates by mutual induction between primary and secondary coils.

MCQ No. 222

The induced emf is directly proportional to:
a. Magnetic flux only
b. Time only
c. Rate of change of magnetic flux
d. Coil resistance

Correct answer: c. Rate of change of magnetic flux

Explanation: Faraday's law states that induced emf is proportional to the rate of change of magnetic flux.

MCQ No. 223

When the frequency of AC increases, the capacitive reactance:
a. Increases
b. Decreases
c. Remains constant
d. Becomes zero

Correct answer: b. Decreases

Explanation: Capacitive reactance is given by $X_C=\frac{1}{2\pi fC}$ , so it decreases with increasing frequency.

MCQ No. 224

The SI unit of inductive reactance is:
a. Henry
b. Weber
c. Ohm
d. Tesla

Correct answer: c. Ohm

Explanation: Like resistance, inductive reactance is measured in ohms (Ω).

MCQ No. 225

A changing magnetic field can produce:
a. Electric charge
b. Electric current
c. Mechanical force only
d. Heat only

Correct answer: b. Electric current

Explanation: A changing magnetic field induces an emf, which produces electric current in a closed circuit.

MCQ No. 226

A coil has 500 turns. The magnetic flux linked with each turn changes from 0.04 Wb to 0.01 Wb in 0.05 s. The induced emf is:
a. 150 V
b. 300 V
c. 450 V
d. 600 V

Correct answer: b. 300 V

Explanation: $E=N\frac{\Delta\Phi}{\Delta t}=500\times\frac{0.03}{0.05}=300\text{ V}$

MCQ No. 227

If the number of turns in both the primary and secondary coils of a transformer is doubled, the output voltage will:
a. Double
b. Become half
c. Remain unchanged
d. Become zero

Correct answer: c. Remain unchanged

Explanation: The turns ratio remains the same, so the output voltage does not change.

MCQ No. 228

An AC generator converts:
a. Chemical energy into electrical energy
b. Mechanical energy into electrical energy
c. Electrical energy into mechanical energy
d. Heat energy into electrical energy

Correct answer: b. Mechanical energy into electrical energy

Explanation: An AC generator works on electromagnetic induction to convert mechanical energy into electrical energy.

MCQ No. 229

The efficiency of a real transformer is less than 100% because of:
a. Copper loss only
b. Iron losses only
c. Leakage of magnetic flux only
d. All of these

Correct answer: d. All of these

Explanation: Practical transformers lose energy due to copper losses, hysteresis losses, eddy currents, and magnetic leakage.

MCQ No. 230

A transformer cannot be used with DC because:
a. DC has high voltage
b. DC produces no changing magnetic flux
c. DC has high frequency
d. DC has low resistance

Correct answer: b. DC produces no changing magnetic flux

Explanation: Without changing magnetic flux, no emf is induced in the secondary coil.

MCQ No. 231

The induced emf in a coil is directly proportional to:
a. Resistance of the coil
b. Rate of change of magnetic flux
c. Length of the wire
d. Diameter of the wire

Correct answer: b. Rate of change of magnetic flux

Explanation: This is the statement of Faraday's law of electromagnetic induction.

MCQ No. 232

Which quantity determines the opposition offered by an AC circuit to current?
a. Resistance only
b. Reactance only
c. Impedance
d. Conductance

Correct answer: c. Impedance

Explanation: Impedance is the total opposition to alternating current.

MCQ No. 233

If resistance in an AC circuit is zero and inductive reactance equals capacitive reactance, the impedance is:
a. Infinite
b. Zero
c. Equal to XL
d. Equal to XC

Correct answer: b. Zero

Explanation: Since $Z=\sqrt{R^2+(X_L-X_C)^2}$ $R=0$ and $X_L=X_C$ , then $Z=0$ .

MCQ No. 234

The magnetic field inside the core of an ideal transformer is produced by:
a. Secondary current only
b. Primary current only
c. Both primary and secondary currents
d. Permanent magnet

Correct answer: b. Primary current only

Explanation: Initially, the alternating current in the primary coil produces the changing magnetic field that links both coils.

MCQ No. 235

The ratio $V_s/V_p$ is equal to:
a. $I_s/I_p$
b. $N_s/N_p$
c. $N_p/N_s$
d. $P_s/P_p$

Correct answer: b. $N_s/N_p$

Explanation: Transformer voltage is directly proportional to the turns ratio.

MCQ No. 236

A transformer having equal turns in primary and secondary coils is called:
a. Step-up transformer
b. Step-down transformer
c. Isolation transformer
d. Power transformer

Correct answer: c. Isolation transformer

Explanation: Equal turns produce equal voltages while providing electrical isolation.

MCQ No. 237

The magnetic field produced in the primary coil of a transformer is:
a. Constant
b. Alternating
c. Zero
d. Random

Correct answer: b. Alternating

Explanation: The AC supply produces a continuously changing magnetic field.

MCQ No. 238

Which of the following will increase the induced emf in a generator?
a. Slower rotation
b. Weaker magnetic field
c. More turns in the coil
d. Smaller coil area

Correct answer: c. More turns in the coil

Explanation: Induced emf is directly proportional to the number of turns.

MCQ No. 239

Which law is based on the conservation of energy?
a. Ohm's law
b. Coulomb's law
c. Lenz's law
d. Hooke's law

Correct answer: c. Lenz's law

Explanation: Lenz's law ensures that induced current always opposes the change producing it, satisfying conservation of energy.

MCQ No. 240

The magnetic flux through a coil becomes zero when:
a. The magnetic field is parallel to the area vector
b. The magnetic field is perpendicular to the area vector
c. The coil has many turns
d. The magnetic field is strong

Correct answer: b. The magnetic field is perpendicular to the area vector

Explanation: Since $\Phi = BA\cos\theta$ , flux becomes zero when $\theta = 90^\circ$ .

MCQ No. 241

In an AC generator, slip rings are used to:
a. Increase current
b. Reverse current every half cycle
c. Maintain continuous electrical contact
d. Reduce resistance

Correct answer: c. Maintain continuous electrical contact

Explanation: Slip rings provide continuous contact between the rotating coil and the external circuit.

MCQ No. 242

A DC generator differs from an AC generator because it uses:
a. Slip rings
b. Split-ring commutator
c. Transformer
d. Capacitor

Correct answer: b. Split-ring commutator

Explanation: The split-ring commutator converts the alternating emf into a unidirectional output.

MCQ No. 243

When AC passes through a pure resistor, electrical energy is mainly converted into:
a. Magnetic energy
b. Heat energy
c. Chemical energy
d. Nuclear energy

Correct answer: b. Heat energy

Explanation: A resistor dissipates electrical energy as heat due to Joule heating.

MCQ No. 244

The average value of a complete sinusoidal AC cycle is:
a. Maximum
b. Minimum
c. Zero
d. Equal to rms value

Correct answer: c. Zero

Explanation: The positive and negative halves of a sine wave cancel each other over one complete cycle.

MCQ No. 245

The rms current of an AC circuit is 5 A. The peak current is approximately:
a. 3.54 A
b. 5 A
c. 7.07 A
d. 10 A

Correct answer: c. 7.07 A

Explanation: $I_0=\sqrt2\times I_{rms}=1.414\times5\approx7.07\text{ A}$ .

MCQ No. 246

Which of the following has the highest efficiency for transmitting electrical power over long distances?
a. Low voltage, high current
b. High voltage, low current
c. Low voltage, low current
d. High current only

Correct answer: b. High voltage, low current

Explanation: High-voltage transmission minimizes current and reduces power loss $(I^2R)$ .

MCQ No. 247

A transformer is mainly used in power transmission because it:
a. Generates electricity
b. Stores electrical energy
c. Changes AC voltage efficiently
d. Converts AC into DC

Correct answer: c. Changes AC voltage efficiently

Explanation: Transformers are essential for stepping voltage up or down with high efficiency.

MCQ No. 248

The commercial value of household AC voltage (Pakistan) is:
a. 110 V (rms)
b. 220 V (rms)
c. 311 V (rms)
d. 440 V (rms)

Correct answer: b. 220 V (rms)

Explanation: Domestic electricity supply in Pakistan is approximately 220 V rms at 50 Hz.

MCQ No. 249

Which of the following quantities is not affected by transformer action?
a. Voltage
b. Current
c. Frequency
d. Number of turns

Correct answer: c. Frequency

Explanation: A transformer changes voltage and current but the AC frequency remains unchanged.

MCQ No. 250

Which statement best summarizes electromagnetic induction?
a. Electric current produces magnetic field only.
b. A changing magnetic field induces an emf in a conductor.
c. Charges attract each other due to magnetic force.
d. A stationary conductor always produces current.

Correct answer: b. A changing magnetic field induces an emf in a conductor.

Explanation: Electromagnetic induction is the production of an emf (and current in a closed circuit) due to a change in magnetic flux, forming the basis of generators, transformers, induction cookers, and many other electrical devices.

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Electromagnetic Induction – 50 Higher-Order Thinking (HOTS) MCQs with Explanations | Competitive Exam Preparation