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Class 12 Physics - Chapter 7: Alternating Current MCQ Questions

10 Questions 20 Minutes
Answered: 0 / 10Unanswered: 10

Your Class 12 Physics Study Path

  1. 1LearnNCERT Solutions
  2. 2PracticeChapter MCQs
  3. 3TestChapter Test
  4. 4PrepareSample Papers
  5. 5Exam PracticePrevious-Year Papers
  6. 6Final CheckMock Test
Question 1

If the rms current in a 50 Hz ac circuit is 5 A, the value of the current 1/300 second after its value becomes zero is

Question 2

As the frequency of an ac circuit increases, the current first increases and then decreases. What combination of circuit elements is most likely to comprise the circuit?

Question 3

In an ac circuit, V and i are given by V = 100 sin (100 t) volt and i = 100 sin (100 + (frac { π }{3})) mA. The power dissipated in circuit is

Question 4

The potential differences across the resistor, capacitor and inductor are 80 V, 40 V and 100 V, respectively in an LCR circuit. The power factor of this circuit is:

Question 5

To reduce the resonant frequency in an LCR series circuit with a generator

Question 6

In an alternating current circuit consisting of elements in series, the current increases on increasing the frequency of supply. Which of the following elements are likely to constitute the circuit?

Question 7

A small signal voltage V(t) = V0 sinω t is applied across an ideal capacitor C

Question 8

When an AC voltage of 220 V is applied to the capacitor C

Question 9

Electrical energy is transmitted over large distances at high alternating voltages. Which of the following statements is incorrect?

Question 10

The output of a step-down transformer is measured to be 24 V when connected to a 12 watt light bulb. The value of the peak current is

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