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

Question # 2

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

Question # 3

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

Question # 4

The bridge circuit of full wave rectification uses

Question # 5

The sum of positive and negative peak values is called:

Question # 6

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

Question # 7

At resonance frequency the impedance of parallel resonance circuit is

Question # 8

A diode characteristic curve is a plot between

Question # 9

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

Question # 10

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

Question # 11

Which of the following has a great concentration of impurity

Question # 12

In a transistor, the central region is called

Question # 13

The wave form of alternating voltage is the graph between:

Question # 14

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
2 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
3 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
4 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
5 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
6 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
7 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
8 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
9 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
10 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)

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