The current flowing in a coil of self-in...

The current flowing in a coil of self-inductance `0.4 mH` is increased by `250mA` in `0.1` sec. the e.m.f. induced will be

`+1V`

`-1V`

`+1mV`

`-1mV`

Text Solution

Verified by Experts

The correct Answer is:

`e=-L(di)/(dt)=-0.4xx10^(-3)xx(250xx10^(-3))/(0.1)=-mV`

Topper's Solved these Questions

ELECTROMAGNETIC INDUCTION
A2Z|Exercise AIIMS Questions|27 Videos
ELECTRIC POTENTIAL & CAPACITANCE
A2Z|Exercise Section D - Chapter End Test|29 Videos
ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM
A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

The current through a coil of inductance 5 mH is reversed from 5A to -5A in 0.01 s. What is the maximum self-induced emf in the coil?

The currents flowing in the two coils of self - inductance L_(1)= 20 m H and L_(2) = 15 mH are increasing at the same rate. If the the power supplied to the two coils is equal find the ratio of (i) induced voltages (ii) the currents and (iii) the energies stored in the two coils at a given instant.

The current in a coil of inductance 5H decreases at the rate of 2A//a . The induced e.m.f. is

A current through a choke coil of self inductance 2H decreases at the rate of 0.5A//s . The e.m.f. developed across the coil is

The current in a coil decreases from 5 A to 0 in 0.1 sec. If the average e.m.f induced in the coil is 50 V, then the self inductance of the coil is

The current through two inductors of self inductance 12 mH and 30 mH is increasing with time at the same rate. Draw graphs showing the variation of the (a ) e.m.f. induced with the rate of change of current in each inductor. (b) enargy stored in each inductor with the current flowing through it. Compare the energy stored in the coils if power dissipated in the coil is same.

If the current 30A flowing in the primary coil is made zero in 0.1 sec. the emf induced in the secondary coil is 1.5 volt. The mutual inductance between the coil is

A 100 turn coil of self-inductance 50 mH carries a current of 10 mA. Find the magnetic flux linked with each turn of coil.

A2Z-ELECTROMAGNETIC INDUCTION-Section D - Chapter End Test

Two pure inductors each of self-inductance L are connected in parallel...
Text Solution
|
A coil and a bulb are connected in series with a dc source, a soft iro...
Text Solution
|
The current flowing in a coil of self-inductance 0.4 mH is increased b...
Text Solution
|
5 cm long solenoid having 10 ohm resistance and 5mH induced is joined ...
Text Solution
|
A solenoid has an inductance of 60 henrys and a resistance of 30 ohms....
Text Solution
|
In a circular conducting coil, when current increases from 2A to 18A i...
Text Solution
|
Find out the e.m.f. produced when the current change from 0 to 1A in 1...
Text Solution
|
A coil of 100 turns carries a current of 5mA and creates a magnetic fl...
Text Solution
|
If the current 30A flowing in the primary coil is made zero in 0.1 sec...
Text Solution
|
A square loop of side 5 cm enters a magnetic field with 1cms^(-1). The...
Text Solution
|
A small coil is introduced between the poles of an electromagnet so th...
Text Solution
|
Two circular coils A and B are facing each other as shown in figure. T...
Text Solution
|
If in a coil rate of change of area is (5meter^(2))/(milli second)and ...
Text Solution
|
Two coils P and Q are placed co-axially and carry current I and I' re...
Text Solution
|
The phase difference between the flux linkage and the induced e.m.f. i...
Text Solution
|
A hundred turns of insulated copper wire are wrapped around an iron cy...
Text Solution
|
In circular coil, when no. of turns is doubled and resistance becomes ...
Text Solution
|
In a transformer, number of turns in the primary coil are 140 and that...
Text Solution
|
Two coil are placed close to each other. The mutual inductance of the ...
Text Solution
|
When the current changes from +2A to -2A in 0.05 second, an e.m.f. of ...
Text Solution
|