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 in reversed biased, current flows through the junction due to the

Question # 2

During each cycle, alternating voltage reaches a peak value

Question # 3

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

Question # 4

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

Question # 5

The magnitude of alternative voltage V:

Question # 6

The closed loop gain of the non-inverting amplifier is given by

Question # 7

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

Question # 8

For normal operation of transistor, the batteries

Question # 9

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

Question # 10

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

Question # 11

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 12

At resonance frequency the impedance of parallel resonance circuit is

Question # 13

SI unit of impedance is

Question # 14

A digital system deals with quantities or variables which have

Question # 15

In series RC circuit when R=Xc, then the phase angle is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
2 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
3 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
4 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
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 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
7 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
8 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
9 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
10 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

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