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 magnitude of alternative voltage V:

Question # 2

The device which allows only the flow of an A.C. through a circuit is

Question # 3

At resonance, the phase angle for RLC series resonance circuit equals

Question # 4

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 5

The bridge circuit of full wave rectification uses

Question # 6

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

Question # 7

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

Question # 8

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 9

In n-p-n transistor, emitter base junction is kept

Question # 10

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

Question # 11

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

Question # 12

During the negative half-cycle of the half-wave rectification, the diode

Question # 13

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 14

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

Question # 15

A diode characteristic curve is a plot between

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
2 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
3 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
4 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
5 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
6 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
7 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
8 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
9 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
10 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate

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