Question # 1

The highest value reached by the voltage or current is one cycle is called:

Choose an answer

Peak to peak value

Peak value

Instantaneous value

Root mean square value

Power dissipation is a pure inductive or in a pure capacitance circuit is:

Choose an answer

10⁶

0

10^∘

Maximum

The circuit which compares the two voltages is.

Choose an answer

LDR

Sensor

Comparator

Logic gate

when an inductor comes close to a metallic object, its inductance is.

Choose an answer

Decreased

Increased

Becomes half

Becomes 4 times

Power dissipated in a pure inductor is.

Choose an answer

Large

Small

Infinite

Zero

In three phase A.C supply coils are inclined at an angle of.

Choose an answer

0^o

90^o

120^o

80^o

In modulation, low frequency signal is known as

Choose an answer

Carrier wave

fluctuated signal

Modulated carrier signal

Modulation signal

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

Choose an answer

Resistive

Capacitive

Inductive

Modulative

Average value of current and voltage over a complete cycle is.

Choose an answer

Positive

Negative

Zero

Infinite

Radio frequency choke is

Choose an answer

Iron cored

Air Cored

Air as well as iron cored

None of these

The electromagnetic spectrum contains

Choose an answer

Radio waves

X-rays

Microwaves

All of these

Xc =

Choose an answer

1/2πfc

2πfc

2π/fc

fc/2π

The phase difference between the current and voltage at resonce is:

Choose an answer

0

π

-π

π/2

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

The internal resistance of a capacitor is called:

Choose an answer

Impedance

Resistance

Reactance

Conductance

In Pakistan the frequency of A.C. supply is.

Choose an answer

50 Hz

60 Hz

45 Hz

70 Hz

The peak value of alternating current is 5√2 A. The mean square value of current will be:

Choose an answer

5A

2.5A

5√2A

5²

If I_o is the peak value of current, then its root mean square value is given by

Choose an answer

2 I_o

I_o

0.7 I_o

More Classes

Other Links

Physics FSC Part 2 Chapter 16 Online MCQ's Test 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

Choose an answer