ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

The average of A.C. current and voltage over a complete cycle is

Question # 2

Peak value of alternative current is:

Question # 3

For a n-p-n transistor, the conventional current equation can be written as

Question # 4

Alternating current can induce voltage because it has a

Question # 5

At resonance, the phase angle for RLC series resonance circuit equals

Question # 6

Which one of the following waves belongs to electromagnetic spectrum

Question # 7

The value of output resistance of OP-AMOP is of the order of

Question # 8

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 9

The closed loop gain of the non-inverting amplifier is given by

Question # 10

Alternating current is produced by a voltage source which polarity:

Question # 11

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 12

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 13

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 14

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 15

The value of current gain of n-p-n transistor is of the order of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
2 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
3 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
4 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
5 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
6 A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
7 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
8 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
9 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
10 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms

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