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

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

Question # 2

Alternating current can induce voltage because it has a

Question # 3

For normal operation of transistor, the batteries

Question # 4

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

Question # 5

In RLC series circuit, resonance occurs when

Question # 6

The magnitude of alternative voltage V:

Question # 7

Average value of A.C voltage during one cycle is

Question # 8

The device which allows only the flow of an A.C. through a circuit is

Question # 9

The alternative voltage of current is actually measured by:

Question # 10

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

Question # 11

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 # 12

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

Question # 13

The time interval during which the Voltage source changes its polarity once is known as:

Question # 14

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
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 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
4 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
5 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
6 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
7 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
8 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
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 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero

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