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

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

Question # 2

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 3

The open loop gain of OP-AMP is of the order of

Question # 4

Which one of the following is correct?

Question # 5

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

Question # 6

In free space, the speed of electromagnetic waves is

Question # 7

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 8

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

Question # 9

The alternative voltage of current is actually measured by:

Question # 10

At resonance, the phase angle for RLC series resonance circuit equals

Question # 11

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

Question # 12

Peak value of alternative current is:

Question # 13

Which of the following has a great concentration of impurity

Question # 14

The most common source of alternating voltage is:

Question # 15

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

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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 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
3 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
4 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
5 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
6 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
7 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
8 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
9 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
10 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero

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