Advertisements
Advertisements
Question
A coil of 200 turns carries a current of 0.4 A. If the magnetic flux of 4 mWb is linked with each turn of the coil, find the inductance of the coil.
Advertisements
Solution
Given data:
N = 200
i = 0.4 A
ΦB = 4 mWb = 4 × 10-3 Wb
L = ?
NΦBi = Li
L = `("N"phi_"B")/"i"`
L = `(200 xx 4 xx 10^-3)/0.4`
`= (cancel(200) xx cancel(40) xx 10^-3)/cancel(4)`
L = 2H
APPEARS IN
RELATED QUESTIONS
Name a common device that uses electromagnets.
Explain why, an electromagnet is called a temporary magnet.
Describe different ways to induce current in a coil of wire.
How is the working of an electric bell affected, if alternating current be used instead of direct current?
In which of the following case does the electromagnetic induction occur?
A magnet is moved through a loop of wire .
Name and state the law which determines the direction of induced current.
or
State Fleming’s right-hand rule.
Welders wear special goggles or face masks with glass windows to protect their eyes from electromagnetic radiations. Name the radiations and write the range of their frequency.
A light metal disc on the top of an electromagnet is thrown up as the current is switched on. Why? Give reason.
Ansari Sir was demonstrating an experiment in his class with the setup as shown in the figure below.
A magnet is attached to a spring. The magnet can go in and out of the stationary coil. He lifted the Magnet and released it to make it oscillate through the coil.
Based on your understanding of the phenomenon, answer the following question.
What will be observed when the Magnet starts oscillating through the coil. Explain the reason behind this observation.
Induced current flows through a coil ______.
