Electric Circuits Which of the following has least resistivity? Mercury. Aluminium. Copper. Lead. Mercury. Aluminium. Copper. Lead. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits A 20 μF capacitor and 200 W, 220 V lamp is connected in series across a 220 V alternating supply. In which frequency of the supply the lamp will glow dimmest? 100 Hz. 1 Hz. 10 Hz. 1000 Hz. 100 Hz. 1 Hz. 10 Hz. 1000 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits What is the real power in AC operation? Apperant power × cosφ. None of these. VIcosφ. Both option A and B. Apperant power × cosφ. None of these. VIcosφ. Both option A and B. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits The efficiency in case of maximum power transfer theorem is 100 %. 50 %. 50 % - 100 %. less than 50 %. 100 %. 50 %. 50 % - 100 %. less than 50 %. ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits An ideal constant voltage source has _______________ internal impedance whereas a constant current source has ____________ internal impedance. infinite, zero infinite, infinite zero, zero zero, infinite infinite, zero infinite, infinite zero, zero zero, infinite ANSWER DOWNLOAD EXAMIANS APP
Electric Circuits Mica capacitor are characterised by all of following except stable operation. accurate value. low losses. low leakage reactance. stable operation. accurate value. low losses. low leakage reactance. ANSWER DOWNLOAD EXAMIANS APP
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