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

Electromagnetic waves transmit energy equal to

Question # 2

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Question # 3

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

Question # 4

During each cycle, alternating voltage reaches a peak value

Question # 5

Alternating current can be transmitted:

Question # 6

The highest value reached by the voltage or current:

Question # 7

The phase at the positive peak of an A.C. cycle is:

Question # 8

Peak value of alternative current is:

Question # 9

The bridge circuit of full wave rectification uses

Question # 10

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 11

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

Question # 12

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

Question # 13

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 14

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 15

The value of current gain of n-p-n transistor is of the order of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
2 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
3 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
4 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
5 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
6 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
7 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
8 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
9 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
10 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge

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