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 entire wave form of sinusoidal voltage is actually a set of all the:

Question # 2

Most OP-AMP operates with

Question # 3

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 4

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 5

When the p-n junction is forward biased its resistance is of the order of

Question # 6

The alternative voltage of current is actually measured by:

Question # 7

Which one of the following is correct?

Question # 8

The input resistance of the OP-AMP is the resistance between the

Question # 9

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

Question # 10

Transmitting antenna emits

Question # 11

The most common source of alternating voltage is:

Question # 12

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

Question # 13

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 14

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

Question # 15

The impedance of RLC series resonance circuit at resonant frequency is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
2 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
3 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
4 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
5 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
6 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
7 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
8 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
9 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
10 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency

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