Alternating current is transmitted to distant places at
Alternating current is transmitted to distant places at Options (a) Low voltage and high current (b) Low voltage and low…
8 years ago
Questions
The primary of a transformer when connected to a dc battery of 10 volt draws a current
The primary of a transformer when connected to a dc battery of 10 volt draws a current of 1mA. The…
8 years ago
If an A.C. mains supply is given to be 220 V, what would be the average e.m.f.
If an A.C. mains supply is given to be 220 V, what would be the average e.m.f. during a positive…
8 years ago
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…
8 years ago
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…
8 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…
8 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…
8 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…
8 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…
8 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)…
8 years ago