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	The phase angle of a series RLC circuit at resonance is	A. 180° B. 90° C. 0° D. None of the these
2	If 250V is the RMS value of alternative voltage, then its peak value V_owill be:	A. 353.5V B. 250V C. 175V D. zero
3	For normal operation of transistor, the batteries	A. V_CCis of much lower value than V_BB B. V_CCis of much higher value than V_BB C. V_{CC is equal to}V_BB D. none of these
4	At resonance, the phase angle for RLC series resonance circuit equals	A. 0° B. 90° C. 180° D. 270°
5	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
6	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
7	The time interval during which the Voltage source changes its polarity once is known as:	A. Time period T B. Half the time period C. Quarter the time period D. Two third of the time period
8	The phase at the positive peak of an A.C. cycle is:	A. 0º B. 90º C. 180º D. 0 andᏘ
9	The value of the input resistance of OP-AMP is of the order of	A. few ohms B. few hundred ohms C. several kilo ohms D. several maga ohms
10	Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:	A. Peak value B. RMS value C. Instantaneous value D. Peak-to-peak value