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

In a transistor, if the central region is p-type then this type of transistor is known as

Question # 2

Alternating current can be transmitted:

Question # 3

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

Question # 4

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 5

The value of the potential difference across the depletion region for the case of germanium is

Question # 6

The sum of positive and negative peak values is called:

Question # 7

The total reactance of a series RLC circuit at resonance is

Question # 8

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

Question # 9

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 10

In RLC series circuit, resonance occurs when

Question # 11

During each cycle, alternating voltage reaches a peak value

Question # 12

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

Question # 13

In free space, the speed of electromagnetic waves is

Question # 14

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 15

The time interval during which the Voltage source changes its polarity once is known as:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
2 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
3 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
4 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
5 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
6 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
7 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
8 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
9 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
10 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1

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