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

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

Question # 2

The closed loop gain of the non-inverting amplifier is given by

Question # 3

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

Question # 4

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 # 5

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

Question # 6

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 7

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 8

The length of rotating vector (on a certain scale) represents the:

Question # 9

The RMS value of alternating current is:

Question # 10

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

Question # 11

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

Question # 12

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 13

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

Question # 14

Transmitting antenna emits

Question # 15

The closed loop gain of the inverting amplifier is written as

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
3 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
4 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
5 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
6 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
7 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
8 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
9 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
10 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none 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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