## The phase angle between the voltage and the current in an AC circuit…

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# Alternating Current

## Choose the correct statement. In the case of AC circuit ohms law holds for_______________?

Choose the correct statement. In the case of AC circuit ohms law holds for_______________? A. Peak values of voltage and current B. Effective values of voltage and current C. Instantaneous values of voltage and currentD. All of the…

## An inductive coil has a resistance of 100Ω. When an AC signal of frequency 1000Hz is fed to the coil…

An inductive coil has a resistance of 100Ω. When an AC signal of frequency 1000Hz is fed to the coil the applied voltage leads the current by 45Ω. What is the inductance of the coil ? A. 10mH B. 12mHC. 16mH D. 20mH…

## An A.C series circuit containing 4Ω resistance and 3Ω inductive reactance. The impedance of the…

An A.C series circuit containing 4Ω resistance and 3Ω inductive reactance. The impedance of the circuit is______________? A. 1ΩB. 5Ω C. 7Ω D. 7Ω

## At resonance the value of the power factor in an L-C-R series circuit is_______________?

At resonance the value of the power factor in an L-C-R series circuit is_______________? A. Zero B. 2C. 1 D. Not definite

## A choke is used as a resistance in_________________?

A choke is used as a resistance in_________________? A. DC circuitB. AC circuits C. Both AC and DC circuit D. Full wave rectifier circuit

## A 10Ω electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the…

A 10Ω electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the potential difference across the heater element ? A. 220V B. 220/ 2V C. 110VD. 220 √2V

## The frequency of a circuit consisting of a capacitance C and a resistor R is________________?

The frequency of a circuit consisting of a capacitance C and a resistor R is________________? A. C/R B. R/CC. 1/RC D. 1/ 2RC

## What is the self-inductance of a coil in which an induced emf of 2V is set up when the current…

What is the self-inductance of a coil in which an induced emf of 2V is set up when the current changes at the rate of 4 As-1 ? A. 0.5 mHB. 0.5H C. 2.0H D. 8.0H

## When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel…

When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V the potential difference across both L & C will be_______________? A. Same B. Different…

## Ammeter connected in an AC circuit measures______________?

Ammeter connected in an AC circuit measures______________? A. The exact value of the currentB. RMS value of the current C. The net value of the current D. The peak value of the current