Advertisements
Advertisements
प्रश्न
A magnetic flux of 8 × 10−4 weber is linked with each turn of a 200-turn coil when there is an electric current of 4 A in it. Calculate the self-inductance of the coil.
Advertisements
उत्तर
Given:-
Magnetic flux linked with each turn, ϕ = 8 × 10−4 Wb
Number of turns, n = 200
Current, i = 4 A
Self-inductance is calculated as:-
\[L = \left( \frac{n\phi}{i} \right)\]
\[=\left( \frac{200}{4} \right) \times (8) \times ( {10}^{- 4} )\]
= 4 × 10−2 H
APPEARS IN
संबंधित प्रश्न
Explain the phenomenon of self induction
Define self-inductance. Write its SI units.
Define self-inductance of a coil. Show that magnetic energy required to build up the current I in a coil of self inductance L is given by `1/2 LI^2`
Define self inductance. Write its S.I. units.
Obtain an expression for the self-inductance of a solenoid.
When the number of turns in a coil is tripled without any change in the length of the coil, its self-inductance ______
A graph of magnetic flux `(phi)` versus current (I) is shown for four inductors A, B, C and D. Larger value of self-inductance is for inductor ____________.
When the current in a coil changes from 2 amp. to 4 amp. in 0.05 sec., an e.m.f. of 8 volt is induced in the coil. The coefficient of self inductance of the coil is ______.
An air-cored solenoid with length 30 cm, area of cross-section 25 cm2 and number of turns 800, carries a current of 2.5 A. The current is suddenly switched off in a brief time of 10-3s. Ignoring the variation in magnetic field near the ends of the solenoid, the average back emf induced across the ends of the open switch in the circuit would be ______.
The self inductance L of a solenoid of length l and area of cross-section A, with a fixed number of turns N increases as ______.
Two inductor coils with inductance 5 mH and 15 mH are connected in parallel. The resultant inductance of the combination of the two coils is ______.
Equivalently, self-inductance equals the magnitude of the induced EMF per unit what?
What does \[\Phi_B\] represent, and what is its SI unit?
After whom is the SI unit henry (H) named?
Which set gives equivalent units for one henry?
For an air (or vacuum) core, which permeability is used in the solenoid derivation?
What is the magnetic field inside a long air-core solenoid?
How does a magnetic core of relative permeability \[\mu_r\] change the solenoid self-inductance expression?
Where is the EMF induced in self-inductance, as compared with mutual inductance?
Which applications are associated with self-inductance and mutual inductance, respectively?
