Advertisements
Advertisements
प्रश्न
What for an inductor is used? Give some examples.
उत्तर
The inductor is a device used to store energy in a magnetic field when an electric current flows through it. The typical examples are coils, solenoids and toroids.
APPEARS IN
संबंधित प्रश्न
Explain different ways to induce current in a coil.
State whether the following statement are true or false:
A generator works on the principle of electromagnetic induction.
Name and state the law which determines the direction of induced current.
or
State Fleming’s right-hand rule.
L, C and R represent the physical quantities inductance, capacitance and resistance respectively. Which of the following combinations have dimensions of frequency?
(a) `1/(RC)`
(b) `R/L`
(c) `1/sqrt(LC)`
(d) C/L
An electron moves on a straight-line path XY as shown in the figure. The coil abcd is adjacent to the path of the electron. What will be the direction of the current, if any, induced in the coil?
Show that Lenz’s law is in accordance with the law of conservation of energy.
Obtain an expression for motional emf from Lorentz force.
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.
A cylindrical bar magnet (A) and similar unmagnetized cylindrical iron bar (B) are dropped through metallic pipe. The time taken to come down by ____________.
A current I = 10 sin(100π t) A is passed in first coil, which induces a maximum e.m.f of 5π volt in second coil. The mutual inductance between the coils is ______.