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When number of identical cells, in parallel combination are increased, the voltage of the circuit will

The voltage of the circuit will remain same when numbers of cells in parallel are increased.... View Article

Ac and dc both can be measured by

Ac and dc both can be measured by hot-wire instruments. Hotwire instrument uses the heating effect of current for measuring the magnitude. The... View Article

In the series LCR circuit at resonance the applied ac voltage is 220V. The potential drop across the inductance is 110 V. what is the potential drop across the resistance?

At resonance, the net potential fall across L and C is zero. So whole of the potential drop is across the resistance.... View Article

The impedance vector, in a vector-impedance diagram, is parallel to X-axis. The circuit is:

The impedance vector, in a vector-impedance diagram, is parallel to X-axis. The circuit is purely resistive.... View Article

Virtual value or effective value of a.c. is

Virtual value or effective value of a.c. is 0.707Io... View Article

An a.c. circuit has a very small band width. The resistance of the circuit should be:

An a.c. circuit has a very small band width. The resistance of the circuit should be low.... View Article

What is the relationship between Em and Eo

Em=-0.637 Eo... View Article

Through which of the ac circuit elements both the e.m.f. and current are in phase?

For a resistive circuit, e.m.f. and current are in phase.... View Article

What will be the reading of a d.c. ammeter in an a.c. circuit where the current flowing is 4A

The ordinary d.c. ammeter cannot measure a.c. currents. They record 0 reading when they are used in a.c. circuits because the average value of... View Article

The average power/cycle associated with inductor is

The average power/cycle associated with inductor is zero.... View Article

In an a.c. circuit containing inductance only

In an a.c. circuit containing inductance only I lags E by 90 degrees.... View Article

In inductance there is opposition to the growth of current, it is due to

In inductance there is opposition to the growth of current, it is due to Self induced e.m.f.... View Article

What is the dimensional formula of time period?

The dimensional formula is defined as the expression of the physical quantity in terms of its basic unit with proper dimensions. The dimensional... View Article

Type of modulation used for continuous and sinusoidal wave is

Amplitude modulation, Frequency modulation and Phase modulation are used for the carrier wave which is a continuous wave whereas Pulse amplitude... View Article

Is it possible to use a capacitor of suitable capacitance instead of a choke coil?

It is possible to use a capacitor of suitable capacitance instead of a choke coil.... View Article

What is the unit of Capacitive Reactance Xc?

The unit of Capacitive Reactance Xc is Ohm. Capacitive reactance is defined as the measure of capacitor's opposition to alternating current. It... View Article

What is the average power consumed/cycle in ideal capacitor.

The average power consumed/cycle in an ideal capacitor is 0. The average power consumed in an ideal capacitor is given as based on the... View Article

In capacitative circuit the resistance is due to

In capacitative circuit the resistance is due to charged capacitor.... View Article

In a set a bulb and a capacitor are connected what with happen if we increase the frequency

In a set a bulb and a capacitor are connected if we increase the frequency bulb will glow brighter as increase in frequency decreases... View Article

As shown in the figure, P and Q are two coaxial conducting loops separated by some distance. When the switch S is closed, a clockwise current flows in P (as seen by E) and an induced current

When switch S is closed magnetic field lines passing through Q increases in the direction from right to left. So, according to Lenz’s law... View Article

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