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 basic circuit element in A.C. circuits are:

Question # 2

At resonance frequency the impedance of parallel resonance circuit is

Question # 3

Electromagnetic waves transmit energy equal to

Question # 4

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

Question # 5

In half wave rectification

Question # 6

In frequency modulation (FM), the carrier waves amplitude

Question # 7

The value of current gain of n-p-n transistor is of the order of

Question # 8

For a n-p-n transistor, the conventional current equation can be written as

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

SI unit of impedance is

Question # 13

The bridge circuit of full wave rectification uses

Question # 14

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

Question # 15

Which one of the following is correct?

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
2 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
3 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
4 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
5 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
6 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
7 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
8 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
9 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
10 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them

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