ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

In free space, the speed of electromagnetic waves is

Question # 2

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

Question # 3

The basic circuit elements of A.C circuit are

Question # 4

The basic circuit element in A.C. circuits are:

Question # 5

The RMS value of alternating current is:

Question # 6

Which one of the following waves belongs to electromagnetic spectrum

Question # 7

At resonance, the impedance of RLC series circuit is

Question # 8

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

Question # 9

The phase angle of a series RLC circuit at resonance is

Question # 10

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 11

An A.C varies as a function of

Question # 12

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

Question # 13

A changing magnetic flux creates around itself

Question # 14

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

Question # 15

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
2 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
3 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
4 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
5 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
6 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
7 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
8 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
9 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
10 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these

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