# CBES Board Class 12-CBES Board(Class 12/Physics)MCQ Questions with Answers(Chapter 7 Alternating Current) Sample Test,Sample questions

## Question: `A transformer works on the principle of`

1.self induction

2.electrical inertia

3.mutual induction

4.magnetic effect of the electrical current

1.maximum

2.Â minimum

3.zero

4.Â infinity

1.maximum

2.minimum

3.zero

4.infinity

## 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

1.remains same

2.zero

3.doubled

4.halved

1.30Â°

2.45Â°

3.60Â°

4.0Â°

## 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

## 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

1.time

2.frequency

3.work

4.angle

## More MCQS

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