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 series RC circuit when R=Xc, then the phase angle is

Question # 2

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

Question # 3

Alternating current can be transmitted:

Question # 4

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

Question # 5

Which one of the following waves belongs to electromagnetic spectrum

Question # 6

In frequency modulation (FM), the carrier waves amplitude

Question # 7

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 8

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

Question # 9

The bridge circuit of full wave rectification uses

Question # 10

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

Question # 11

The closed loop gain of the inverting amplifier is written as

Question # 12

Most OP-AMP operates with

Question # 13

In describing functions of digital systems, a closed switch will be shown as

Question # 14

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

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 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
2 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
3 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
4 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
5 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
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 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
8 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
9 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
10 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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