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

Chock consumes externally small

Question # 2

In n-p-n transistor, emitter base junction is kept

Question # 3

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

Question # 4

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

Question # 5

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 6

Alternating current can be transmitted:

Question # 7

In half wave rectification

Question # 8

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 9

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Question # 10

The RMS value of alternating current is:

Question # 11

The device which allows only the flow of an A.C. through a circuit is

Question # 12

The power factor of resonant series circuit is

Question # 13

The highest value reached by the voltage or current:

Question # 14

For normal operation of transistor, the batteries

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
2 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
3 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
4 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
5 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
6 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
7 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
8 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
9 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
10 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these

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