A transformer works on the principle of

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Question:
A transformer works on the principle of

1.self induction

2.electrical inertia

3.mutual induction

4.magnetic effect of the electrical current

Posted Date:-2021-02-02 07:06:11

More MCQS Questions and answers

  1. A transformer works on the principle of
  2. At resonance frequency the impedance in series LCR circuit is
  3. At resonant frequency the current amplitude in series LCR circuit is
  4. For an ideal-step-down transformer, the quantity which is constant for both the coils is
  5. In a pure capacitive circuit if the frequency of ac source is doubled, then its capacitive reactance will be
  6. In a series LCR circuit the voltage across an inductor, capacitor and resistor are 20 V, 20 V and 40 V respectively. The phase difference between the applied voltage and the current in the circuit is
  7. 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?
  8. In which of the following circuits the maximum power dissipation is observed?
  9. Quality factor and power factor both have the dimensions of

Question :- A transformer works on the principle of

1.self induction

2.electrical inertia

3.mutual induction

4.magnetic effect of the electrical current

Answer 3

Question :- At resonance frequency the impedance in series LCR circuit is

1.maximum

2. minimum

3.zero

4. infinity

Answer 2

Question :- At resonant frequency the current amplitude in series LCR circuit is

1.maximum

2.minimum

3.zero

4.infinity

Answer 1

Question :- For an ideal-step-down transformer, the quantity which is constant for both the coils is

1.current in the coils

2.voltage across the coils

3.resistance of coils

4.power in the coils

Answer 4

Question :- In a pure capacitive circuit if the frequency of ac source is doubled, then its capacitive reactance will be

1.remains same

2.zero

3.doubled

4.halved

Answer 3

Question :- In a series LCR circuit the voltage across an inductor, capacitor and resistor are 20 V, 20 V and 40 V respectively. The phase difference between the applied voltage and the current in the circuit is

1.30°

2.45°

3.60°

4.0°

Answer 4

Question :- 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?

1.Only resistor

2.Resistor and inductor

3.Resistor and capacitor

4.Only inductor

Answer 3

Question :- In which of the following circuits the maximum power dissipation is observed?

1.Pure capacitive circuit

2.Pure inductive circuit

3.Pure resistive circuit

4.None of these

Answer 3

Question :- Quality factor and power factor both have the dimensions of

1.time

2.frequency

3.work

4.angle

Answer 4
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