Advertisements
Advertisements
प्रश्न
What is meant by mutual induction?
Advertisements
उत्तर
When an electric current passing through a coil changes with time, an emf is induced in the neighbouring coil. This phenomenon is known as mutual induction.
APPEARS IN
संबंधित 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
Define self-inductance of a coil interms of
- magnetic flux and
- induced emf
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?
Show that the mutual inductance between a pair of coils is same (M12 = M21).
Determine the self-inductance of 4000 turn air-core solenoid of length 2m and diameter 0.04 m.
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.
