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

Most OP-AMP operates with

Question # 2

The RMS value of alternating current is:

Question # 3

Alternating current can be transmitted:

Question # 4

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 # 5

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 6

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 7

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

Question # 8

The amplifier which us used to perform mathematical operations electronically is known as

Question # 9

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

Question # 10

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

Question # 11

For normal operation of transistor, the batteries

Question # 12

The impedance of RLC series resonance circuit at resonant frequency is

Question # 13

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 14

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
2 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
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 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
5 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
6 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
7 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
8 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
9 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
10 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three

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