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

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 2

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 3

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 4

Chock consumes externally small

Question # 5

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

Question # 6

A digital system deals with quantities or variables which have

Question # 7

When the p-n junction is forward biased its resistance is of the order of

Question # 8

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

Question # 9

A diode characteristic curve is a plot between

Question # 10

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

Question # 11

Most OP-AMP operates with

Question # 12

The input resistance of the OP-AMP is the resistance between the

Question # 13

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

Question # 14

At resonance frequency the impedance of parallel resonance circuit is

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
4 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
5 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
6 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
7 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
8 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
9 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
10 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these

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