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AP Intermediate 2nd Year Electromagnetic Induction & Alternating Current — practice questions — page 3

Explore 116 free Electromagnetic Induction & Alternating Current questions in AP Intermediate 2nd Year 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 61–90 of 116.

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 →An inductor in an ac circuit offers:Read the answer and worked solution →A capacitor in an ac circuit offers:Read the answer and worked solution →

Worked practice questions

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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Alternating current numbers

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Questions
  1. Answer
    220
    Question
    Household line voltage in volts, as an rms value
  2. Answer
    3
    Question
    Impedance at resonance if R is 3 ohm
  3. Answer
    0
    Question
    Power factor of a purely wattless current
Instructions
Type the number only.
_Source: syllabus Physics, Ch 7 'Alternating Current'_

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Name the ac quantity

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Questions
  1. Question
    Measured in ohms and rises with frequency
    Choices
    1. Inductive reactance
    2. Power factor
    3. rms current
    Correct choice
    Inductive reactance
  2. Question
    The cosine of the phase angle
    Choices
    1. Inductive reactance
    2. Power factor
    3. rms current
    Correct choice
    Power factor
  3. Question
    The steady dc current with the same heating effect
    Choices
    1. Impedance
    2. Resonance
    3. rms current
    Correct choice
    rms current
  4. Question
    Total opposition combining R with both reactances
    Choices
    1. Impedance
    2. Resonance
    3. rms current
    Correct choice
    Impedance
Instructions
Tap the quantity being described.
_Source: syllabus Physics, Ch 7 'Alternating Current'_

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