Exercise (Previous Year Questions)
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Simple step-by-step solutions to Exercise (Previous Year Questions) questions of Alternating Current from Beta Question Bank for Medical: Physics. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from Exercise (Previous Year Questions) with Hints & Solutions
A transformer is used to light a and lamp from a mains. If the main current is amp, the efficiency of the transformer is approximately -
In an a.c. circuit the e.m.f. and the current at any instant are given respectively by:
The average power in the circuit over one cycle of a.c. is :
A condenser of capacity C is charged to a potential difference of V1. The plates of the condenser are then connected to an ideal inductor of inductance L. The current through the inductors when the potential difference across the condenser reduces to V2 is ?
In a given series LCR circuit and the current
An electrical device operate at current and . If it is connected with and . Then power consumption :-
A series R-C circuit is connected to an alternating voltage source. Consider two situations :-
(a) When capacitor is air filled.
(b) When capacitor is mica filled.
Current through resistor is i and voltage across capacitor is V then :-
In the given circuit the potential difference across resistance is and power consumed by it is . If frequency is find the value of :
A series L-C-R circuit R = 10 k, L = 20mH, C = 5µF is connected to AC source V = 10sint. Find out band width of signal :