ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

The value of output resistance of OP-AMOP is of the order of

Question # 2

Alternating current can induce voltage because it has a

Question # 3

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

Question # 4

Conversion of alternating current into direct current is called

Question # 5

The total reactance of a series RLC circuit at resonance is

Question # 6

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 7

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

Question # 8

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

Question # 9

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 # 10

Which of the following diode is used for the detection of light

Question # 11

Which of the following has a great concentration of impurity

Question # 12

At resonance, the impedance of RLC series circuit is

Question # 13

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

Question # 14

A changing magnetic flux creates around itself

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
2 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
3 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
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 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
6 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
7 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
8 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
9 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
10 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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