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

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

Question # 2

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

Question # 3

Which of the following has a great concentration of impurity

Question # 4

The sum of positive and negative peak values is called:

Question # 5

In half wave rectification

Question # 6

In RLC series circuit, resonance occurs when

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 12

The Instantaneous value of alternative current maybe:

Question # 13

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

Question # 14

Peak value of alternative current is:

Question # 15

SI unit of impedance is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
3 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
4 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
5 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
6 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
7 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
8 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
9 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
10 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

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