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

Question # 2

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

Question # 3

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

Question # 4

In series RC circuit when R=Xc, then the phase angle is

Question # 5

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 6

The amplifier which us used to perform mathematical operations electronically is known as

Question # 7

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

Question # 8

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 9

A P-N juction or semiconductor diode cannot be used as

Question # 10

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

Question # 11

The basic circuit elements of A.C circuit are

Question # 12

A changing magnetic flux creates around itself

Question # 13

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

Question # 14

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 15

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

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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 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
3 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
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 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
6 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
7 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
8 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
9 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
10 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

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