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qUESTIONS

A capacitor 50 µF is connected to a.c. source e = 220sin 50 t (e in volt, t in second). The value of peak current is:

In series LCR circuit, the voltage across. L, C and R is 50 V, 20 V and 40 V respectively. The a. c. voltage applied across the combination of LCR is

In series L-C-R circuit C = 2µF, L = 1mH and R = 102. What is the ratio of energies stored in the inductor and the capacitor, when the maximum current flows in the circuit

When a. c. source is connected across a pure resistor, the correct phase relation between current (iR) and voltage (eR) is shown in figure

The instantaneous values of current and voltage in a AC circuit are given by: I = 6 sin (100πt + π/4) and V=5 sin (100πt -π/4) then

A circuit of negligible resistance has an inductor of 0.16 H and capacitor of 25 µF connected in series with an alternating voltage source. The resonating frequency of the circuit is:

In series L-C-R circuit, the capacitance is changed from ‘C’ to ‘2C”. To obtain the same resonance frequency the inductance should be changed from ‘L’ to :

An inductance coil has a resistance of 100 2. When an a.c. signal of frequency 100 Hz is applied to the coil, the voltage leads the current by 45°. The inductance of the coil in henry is

Resistor of 2 Ω, inductor of 100 µΗ and capacitor of 400 pF are connected in series across an a.c. source of erms= 0.1 volt. At resonance, voltage drop across inductor is:

A capillary tube is dipped in a liquid. If the levels of liquid inside and outside the tube are same then the angle of contact is

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