Home
Class 12
PHYSICS
When a coil is connected to a 100 V D.C...

When a coil is connected to a 100 V D.C. supply, the current is 2 A. When the same coil is connected to A.C. source `E=100sqrt(2) sin omega t`, the current is 1 A. Find the inductive reactance used in the circuit.

Text Solution

Verified by Experts

In DC. Circuit `l = V/R rArr" So, "R = V/t = 50 Omega`
In AC `l_(rms)=(V_(rms))/Z rArr 1 = 100/Z rArr Z = 100 Omega`
Now `Z = sqrt(R^2 + X_L^2) rArr X_L = 50 sqrt3Omega`
Promotional Banner

Similar Questions

Explore conceptually related problems

When an inductor coil is connected to an ideal battery of emf 10V, a constant current 2.5 S flows. When the same inductro coil is connected to an ac source of 10V and 50 HZ then the current is 2A. Find out the inductance of the coil.

A student connects a long air cored - coil of manganin wire to a 100 V D.C. supply and records a current of 25 amp. When the same coil is connected across 100 V. 50 Hz A.C. the current reduces to 20 A , the reactance of the coil is :-

Assertion: If an inductor coil is connected to DC source, the current supplied by it is I_(1) . If the same coil is connected with an AC source of same voltage. Then current is I_(2) , then I_(2) lt I_(1) . Reason: In AC circuit, inductor coil offers more resistance.

A coil when connected across a 10 V d.c. supply draws a current of 2 A. When it is connected across 10 V - 50 hz a.c. supply the same coil draws a current of 1 A. Explain why? Hence determine self inductance of the coil.

When a coil is connected to a D.C. source of e.m.f. 12 volt, then a current of 4 ampere flows in it. If the same coil is connected to a 12 volt, 50 cycle/s A.C. source, then the current flowing in it is 2.4A . The self inductance of the coil will be

A current of 4A flows in a coil when connected to a 12V DC source. If the same coil is connected to a 12V, 50 rad//s AC source, a current of 2.4A flows in the circuit. Determine the inductance of the coil. Also, find the power developed in the circuit if a 2500muF capacitor is connected in series with the coil.

A current of 4 A flows in a coil when connected to a 12 V dc source. If the same coil is connected to a 12 V, 50 rad s^(-1) ac source, a current of 2.4 A flows of the coil in the circuit. The power developed in the circuit of a 2500 (mu)F capacitor that is connected in series with the coil is

A current of 4 A flows in a coil when connected to a 12 V dc source. If the same coil is connected to a 12 V, 50 rad s^(-1) ac source, a current of 2.4 A flows of the coil in the circuit. The inductance of the coil is

A bulb is connected to a 100 V DC supply . It is found that the current of 5 A flows in the circuit. The same bulb is connected to an AC supply at 120 V . The frequency of source is 50 Hz. Calculate the inductance of coil required so that the lamp glows in an AC circuit too.

An inductance of 0.1 henry is connected with D.C. source of 120 volt. If the current flowing in the inductive coil is 0.5 amp, then resistance of the coil is: