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

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

Question # 2

The phase angle of a series RLC circuit at resonance is

Question # 3

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

Question # 4

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

Question # 5

The sum of positive and negative peak values is called:

Question # 6

The average of A.C. current and voltage over a complete cycle is

Question # 7

The most common source of alternating voltage is:

Question # 8

The basic circuit element in D.C. circuit is:

Question # 9

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

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 emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 12

In which of the following components, pn-junction is used

Question # 13

The value of the input resistance of OP-AMP is of the order of

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
2 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
3 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
4 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
5 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
6 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
7 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
8 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
9 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
10 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them

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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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