Advertisements
Advertisements
प्रश्न
When the current changes from +2A to −2A in 0.05 s, an emf of 8 V is induced in a coil. The co-efficient of self-induction of the coil is
विकल्प
0.2 H
0.4 H
0.8 H
0.1 H
Advertisements
उत्तर
0.1 H
APPEARS IN
संबंधित प्रश्न
What do you mean by self-induction?
Define self-inductance of a coil interms of
- magnetic flux and
- induced emf
How will you define the unit of inductance?
What do you understand by self-inductance of a coil?
Give the physical significance of self-inductance of a coil.
Assuming that the length of the solenoid is large when compared to its diameter, find the equation for its inductance.
An inductor of inductance L carries an electric current i. How much energy is stored while establishing the current in it?
Two air core solenoids have the same length of 80 cm and same cross–sectional area 5 cm2. Find the mutual inductance between them if the number of turns in the first coil is 1200 turns and that in the second coil is 400 turns.
A long solenoid having 400 turns per cm carries a current 2A. A 100 turn coil of cross-sectional area 4 cm2 is placed co-axially inside the solenoid so that the coil is in the field produced by the solenoid. Find the emf induced in the coil if the current through the solenoid reverses its direction in 0.04 sec.
A 200 turn circular coil of radius 2 cm is placed co-axially within a long solenoid of 3 cm radius. If the turn density of the solenoid is 90 turns per cm, then calculate mutual inductance of the coil and the solenoid.
