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

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 2

The output voltage of half wave rectification is in the form of

Question # 3

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

Question # 4

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

Question # 5

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 6

The value of the input resistance of OP-AMP is of the order of

Question # 7

The basic circuit elements of A.C circuit are

Question # 8

Transmitting antenna emits

Question # 9

A diode characteristic curve is a plot between

Question # 10

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

Question # 11

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

Question # 12

Peak value of alternative current is:

Question # 13

Which one of the following is correct?

Question # 14

Alternating current can induce voltage because it has a

Question # 15

During the positive half-cycle in the half-wave rectification,the diode

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
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 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
4 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
5 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
6 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
7 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
8 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)
9 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
10 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these

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