Question # 1

When 10 V are applied to an A.C circuit, the current flowing in it is 100 mA. It impedance is.

Choose an answer

100 Ohm

10 Ohm

1000 Ohm

1 Ohm

In metal detector, we use.

Choose an answer

L-C circuit

R-L circuit

R-C circuit

RLC series circuit

SI unit of reactance is.

Choose an answer

Ohm

Mho

Farad

Henry

The slope of q-t curve at any instant of time gives.

Choose an answer

Voltage

Current

Charge

Botha a and b

At high frequency, the current through a capacitor is

Choose an answer

Small

Infinity

Zero

Large

The phase angle of a series RLC circult at resonant frequency is

Choose an answer

1/2

sigma

Zero

sigma /4

The most common source of an A.C. Voltage is.

Choose an answer

Motor

Cell

Generator

Thermo couple

In a pure inductive A.C. circuit the current.

Choose an answer

Lags behind voltage by 90 ^o

Leads the voltage by 90 ^o

In phase with voltage

Leads the voltage by 270 ^o

In chopke coil the resistance X_L an resistance R are:

Choose an answer

X_L=R

X_L<<R

X_L>>R

X_L=∞

The inductive reactance of a coil is direction proportional to.

Choose an answer

Inductance

Resistance

Frequency of A.C.

Both frequency of A.C. and inductance

Radio frequency choke is

Choose an answer

Iron cored

Air Cored

Air as well as iron cored

None of these

At resonance, the behavior of R-L-C series circuit is.

Choose an answer

Resistive

Capacitive

Inductive

Modulative

Phase difference between V and I of an A.C through resistor is.

Choose an answer

Zero Degree

90 ^o

80^o

120^o

The combined effect of resistance and reactance is knows as.

Choose an answer

Inductance

Conductance

Resistance

Impedance

An inductor of 1 henry inductance has a reactance 500 ohms, then the frequency required is approximately

Choose an answer

50 Hz

100 Hz

80 Hz

120 Hz

The AC system is preferred to DC system because:

Choose an answer

AC voltage can be easily changed in magnitude

DC motor angular velocity is affected badly

High voltage AC transmission is less efficient

Domestic appliance require AC voltage for their operation

The circuit in which current and voltage are in phase, the power factor is:

Choose an answer

Zero

1

-1

2

More Classes

Other Links

Ics Part 2 Physics Chapter 5 Test Online MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer