## Question

### Solution

Correct option is

75o

The inductive reactance is The capacitive resistance is Here XC > XL, the circuit is capacitive and so the current leads the emf. The angle of lead is given by  . .

#### SIMILAR QUESTIONS

Q1

A coil of inductance 0.50 H and resistance is connected to a 240 V-50 Hz a.c. supply. What are the maximum current in the coil and the time lag between voltage maximum and current maximum?

Q2

An emf E = 100 sin 314t volt is applied across a pure capacitor of 637 . Find the instantaneous current i.

Q3

An a.c. voltage V = 200 sin 314t is applied across a series C-R circuit.Where . Find the capacitive reactance.

Q4

In a series R-C circuit, V = 100 V and . Find the current in the circuit and the voltage across the capacitor and the resistor. Is the algebraic sum of these voltages more than the source voltage? If yes, resolve the paradox.

Q5

Calculate the rms current in an a.c. circuit containing a capacitor of in series. The power supply in the circuit is rated 230 V, 50 Hz.

Q6

An alternating rms current of 1.5 mA and angular frequency flows through a capacitor in series. Calculate the rms voltage across the capacitor and the impedance of the circuit.

Q7

When an alternating voltage of 220 V is applied across a device X, a current 0.5 A flows through the circuit and is in phase with the applied voltage. When the same voltage is applied across another device Y, again the same current flows but it leads the voltage by . Compute the current in the circuit when the same voltage in applied across the series combination of X and Y.

Q8 capacitor in series with a resistor is connected to a 110V-60 Hz supply. What is the maximum current in the circuit? What is the time lag between current maximum and voltage maximum?

Q9

A 20 V-5 W lamp is to run on 200 V-50 Hz a.c. mains. Find the capacitance of a capacitor required to run the lamp.

Q10 capacitor, a 0.10- H inductor and a 25.0- resistor are connected with an a.c. source of emf E = 310 sin 314t. Find the frequency of the emf.