ECAT Pre General Science Physics Chapter 16 MCQ Test With Answer

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

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

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ECAT Pre General Science Physics Chapter 16 Alternating Current

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Question # 1

For normal operation of transistor, the batteries

Question # 2

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

The alternative voltage of current is actually measured by:

Question # 7

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 8

The magnitude of alternative voltage V:

Question # 9

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 10

The open loop gain of OP-AMP is of the order of

Question # 11

Which one of the following waves belongs to electromagnetic spectrum

Question # 12

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

Question # 13

The Instantaneous value of alternative current maybe:

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

Electromagnetic waves transmit energy equal to

Question # 20

Alternating current can be transmitted:

Question # 21

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 22

During the negative half-cycle of the half-wave rectification, the diode

Question # 23

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 24

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

Question # 25

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

Question # 26

Which of the following has a great concentration of impurity

Question # 27

In half wave rectification

Question # 28

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

Question # 29

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

Question # 30

OP-AMP has the following input terminals

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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)
2 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
3 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these
4 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
5 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
6 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
7 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
8 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
9 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
10 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above

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