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ISC Class 12 Electromagnetic Induction & Alternating Current — practice questions

Explore 58 free Electromagnetic Induction & Alternating Current questions in ISC Class 12 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Electromagnetic Induction & Alternating Current questions and exercises with answers

Showing questions 1–30 of 58.

Spot the odd one outRead the answer and worked solution →Whose experiments led to modern generators and transformers?Read the answer and worked solution →Moving a magnet towards a coil induces in the coil an:Read the answer and worked solution →Alternating current numbersRead the answer and worked solution →Name the ac quantityRead the answer and worked solution →Alternating current bingoRead the answer and worked solution →Complete the resonance ruleRead the answer and worked solution →The SI unit of magnetic flux is the:Read the answer and worked solution →Inductance depends only on the coil's geometry and its:Read the answer and worked solution →Induction bingoRead the answer and worked solution →NEET · Physics · Lenz's Law — EMF SignRead the answer and worked solution →Self or mutual inductance?Read the answer and worked solution →True or false about inductionRead the answer and worked solution →The induced current opposes the change that produced it, because:Read the answer and worked solution →Because the induced current opposes the motion, the mover must:Read the answer and worked solution →The constant linking flux linkage to current is called:Read the answer and worked solution →The constant M linking two neighbouring coils is called:Read the answer and worked solution →The constant L for a single coil is called its:Read the answer and worked solution →Mutual inductance is also called the coefficient of:Read the answer and worked solution →An alternative name for the SI unit of magnetic flux is:Read the answer and worked solution →If the induced current did not oppose the change, one could get:Read the answer and worked solution →A galvanometer connected to a coil shows deflection only when:Read the answer and worked solution →Flux through a coil can be changed without moving it, by changing:Read the answer and worked solution →The negative sign in Faraday's law expresses which law?Read the answer and worked solution →Induced emf depends on the time rate of change of:Read the answer and worked solution →Complete the induction lawsRead the answer and worked solution →NEET · Physics · AC — Pure R, L or CRead the answer and worked solution →Order what happens at resonanceRead the answer and worked solution →The effective value of an alternating current is called its:Read the answer and worked solution →The household line voltage of 220 V is which kind of value?Read the answer and worked solution →

Worked practice questions

Spot the odd one out

Read exercise and reference answers
Questions
  1. Items
    1. Weber
    2. Tesla m2
    3. Flux unit
    4. Henry
    Odd item
    Henry
  2. Items
    1. Faraday
    2. Henry
    3. Lenz
    4. Newton
    Odd item
    Newton
  3. Items
    1. Ohm
    2. Self inductance
    3. Mutual inductance
    4. Henry
    Odd item
    Ohm
  4. Items
    1. Steady flux
    2. Moving magnet
    3. Shrinking coil
    4. Rotating coil
    Odd item
    Steady flux
Instructions
Tap the item that does not belong with the others.
_Source: syllabus Physics, Ch 6 'Electromagnetic Induction'_

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Whose experiments led to modern generators and transformers?

  1. Faraday and Henry
  2. Newton and Hooke
  3. Ampere and Volta
  4. Kelvin and Joule
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Correct answer: A. Faraday and Henry

1. Two experimenters worked on induction around 1830. 2. One worked in England, the other in the United States. 3. Faraday and Henry did the pioneering work. 4. So the answer is Faraday and Henry. _Source: syllabus Physics, Ch 6 'Electromagnetic Induction'_

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Moving a magnet towards a coil induces in the coil an:

  1. Optical signal
  2. Acoustic pulse
  3. Electric current
  4. Magnetic charge
Show answer and solution

Correct answer: C. Electric current

1. The flux through the coil changes as the magnet nears it. 2. That change drives an emf around the loop. 3. Electric current is induced in the coil. 4. So the answer is electric current. _Source: syllabus Physics, Ch 6 'Electromagnetic Induction'_

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