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

During each cycle, alternating voltage reaches a peak value

Question # 2

The alternative voltage of current is actually measured by:

Question # 3

The phase at the positive peak of an A.C. cycle is:

Question # 4

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

Question # 5

In which of the following components, pn-junction is used

Question # 6

The basic circuit element in D.C. circuit is:

Question # 7

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

Question # 8

In a transistor, the central region is called

Question # 9

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

Question # 10

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 # 11

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 12

Which of the following has a great concentration of impurity

Question # 13

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

Question # 14

At resonance frequency the impedance of parallel resonance circuit is

Question # 15

The open loop gain of OP-AMP 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 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
2 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
3 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
4 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
5 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
6 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
7 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
8 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
9 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
10 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value

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