ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

Question # 2

The highest value reached by the voltage or current:

Question # 3

The impedance of RLC series resonance circuit at resonant frequency is

Question # 4

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 5

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 6

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

Question # 7

Electromagnetic waves transmit energy equal to

Question # 8

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

Question # 9

The basic circuit element in A.C. circuits are:

Question # 10

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

Question # 11

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

Question # 12

In free space, the speed of electromagnetic waves is

Question # 13

Alternating current is produced by a voltage source which polarity:

Question # 14

The total reactance of a series RLC circuit at resonance is

Question # 15

When the pn-junction is in reversed biased, current flows through the junction due to the

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
3 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
4 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
5 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
6 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
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 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
9 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
10 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential

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