If both the resistance and the inductance in an LR AC series circuit are doubled
If both the resistance and the inductance in an LR AC series circuit are doubled the new impedance will be…
7 years ago
Alternating Current
The instantaneous values of alternating current and voltages in a circuit are given as
The instantaneous values of alternating current and voltages in a circuit are given as i = 1/√2 sin (100πt) amper…
7 years ago
In R-L-C series circuit, the potential differences across each element is 20 V.
In R-L-C series circuit, the potential differences across each element is 20 V. Now the value of the resistance alone…
7 years ago
The voltage of an a.c.supply varies with time (t) as V=120 sin 100 πt the maximum voltage
The voltage of an a.c.supply varies with time (t) as V=120 sin 100 πt cos 100 πt the maximum voltage…
7 years ago
For a transformer, the turns ratio is 3 and its efficiency is 0.75. The current flowing
For a transformer, the turns ratio is 3 and its efficiency is 0.75. The current flowing in the primary coil…
7 years ago
In an ac circuit an alternating voltage e = 200 √2 sin 100 t volts is connected
In an ac circuit an alternating voltage e = 200 √2 sin 100 t volts is connected to a capacitor…
7 years ago
If the alternating current I=I₁ cosωt+I₂ sinωt, then the rms current is given by
If the alternating current I=I₁ cosωt+I₂ sinωt, then the rms current is given by Options (a) I₁+I₂/√2 (b) │I₁+I₂│/√2 (c)…
7 years ago
An ac voltage is applied to a resistance R and an inductor L in series
An ac voltage is applied to a resistance R and an inductor L in series. If R and the inductive…
7 years ago
Weber ampere per metre is equal to
Weber ampere per metre is equal to Options (a) Joule (b) Henry (c) Newton (d) Watt Correct Answer: Newton Explanation:…
7 years ago
The alternating current in a circuit is given by I=50 sin314t. The peak value
The alternating current in a circuit is given by I=50 sin314t. The peak value and frequency of the current are…
7 years ago