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ECAT Pre General Science Physics Chapter 16 Alternating Current Online Test
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Total Questions30
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Time Allowed30
ECAT Pre General Science Physics Chapter 16 Alternating Current Online Test
The basic circuit element in A.C. circuits are:
If the value of C in a series RLC circuit is increased, the resonant frequency
When the emitter-base junction of a transistor is reverse biased, collector current
When the p-n junction is forward biased its resistance is of the order of
Conversion of alternating current into direct current is called
The input resistance of the OP-AMP is the resistance between the
The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
For normal operation of transistor, the batteries
Which of the following diodes can operate in the reverse biased condition
Nowadays, Most of the electric energy is produced by the A.C. generators using:
When the pn-junction is forward biased. the current flows through it is of the order of
In RLC series circuit, resonance occurs when
Chock consumes externally small
During each cycle, alternating voltage reaches a peak value
Which one of the following waves belongs to electromagnetic spectrum
The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
When either L or C is increased, the resonant frequency of the RLC series circuit
The highest value reached by the voltage or current:
The most common source of alternating voltage is:
A changing magnetic flux creates around itself
The RMS value of alternating current is:
To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
The impedance of RLC series resonance circuit at resonant frequency is
Most OP-AMP operates with
If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
In describing functions of digital systems, a closed switch will be shown as
Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
The time interval during which the Voltage source changes its polarity once is known as:
A digital system deals with quantities or variables which have
In free space, the speed of electromagnetic waves is
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