ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

Top Scorers Of Physics ECAT Pre Engineering Chapter 16 Alternating Current MCQ`s Test

Sr.#	Question	Answer
1	During the positive half-cycle in the half-wave rectification,the diode	A. does not conduct B. conducts C. either of these D. neither of these
2	An A.C varies as a function of	A. Current B. Voltage C. Time D. Charge
3	When the p-n junction is forward biased its resistance is of the order of	A. few mega ohms B. few kilo ohms C. few ohms D. few milli ohms
4	The phase angle of a series RLC circuit at resonance is	A. 180° B. 90° C. 0° D. None of the these
5	The value of output resistance of OP-AMOP is of the order of	A. few ohms B. few hundred ohms C. several kilo ohms D. several mega ohms
6	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	A. base and emitter B. collector and emitter C. base and collector D. any one of these
7	In describing functions of digital systems, a closed switch will be shown as	A. 0 B. 1 C. low D. any one of these
8	If we connected the ordinary DC ammeter to measure alternating current, it would measure its:	A. Instantaneous value B. RMS value C. Value averaged over a cycle D. Either (B) or (C)
9	During the negative half-cycle of the half-wave rectification, the diode	A. does not conduct B. conducts C. either of these D. none of these
10	Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length	A. X-rays B. Ultraviolet rays C. y-rays D. Cosmic rays