You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Physics

Self Induction

A primary coi...

Question

A primary coil and secondary coil are placed close to each other. A current, which changes at the rate of $25$ amp in a millisecond, is present in the primary coil. If the mutual inductance is $92 \times 10^{- 6} H$ , then the value of induced emf in the secondary coil is:

4.6

No worries! We‘ve got your back. Try BYJU‘S free classes today!

2.3

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

0.368

No worries! We‘ve got your back. Try BYJU‘S free classes today!

0.23

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $2.3$ V
Mutual inductance, $M = 92 \times 10^{- 6} H$
Rate of change of current, $\frac{d i}{d t} = 25 A / m s$

$\Rightarrow e = M \frac{d i}{d t} = 92 \times 10^{- 6} \times \frac{25}{10^{- 3}} = 2.3 V$

Suggest Corrections

Similar questions

Q. In a spark plug which is connected to the secondary coil of transformer an emf 40000V is induced when in primary coil current changes from 4A to 0 in

10 μ s

. The self inductance of secondary coil is 1000H. The minimum value of self inductance of primary coil is

10^{- x}

. Then find x.___

Q. When the current in a primary coil is changed from

0.5

a m p e r e

2.0

a m p e r e

300

m i l l i s e c o n d s

, then the emf induced in secondary coil is

0.5

v o l t

. Calculate the mutual inductance between the two coils.

Q. The coefficient of mutual inductance of the two coils is

5 H

. The current through the primary coil is reduced to zero value from

3 A

1

millisecond. The induced emf in the secondary coils is

The mutual inductance between two coils is 1.25 henry. If the current in the primary coil changes at a rate of 80 ampere/second, then the induced e.m.f. in the secondary coil is

Q. In a car spark-coil, when the current in the primary is reduced from

4.0 A

zero

10 μ s

, an emf of

40, 000 V

is induced in the secondary coil. Find the mutual inductance

M

of the primary and the secondary windings of the spark coil.

Join BYJU'S Learning Program

A primary coil and secondary coil are placed close to each other. A current, which changes at the rate of 25 amp in a millisecond, is present in the primary coil. If the mutual inductance is 92×10−6 H, then the value of induced emf in the secondary coil is:

The correct option is B 2.3 VMutual inductance, M=92×10−6 HRate of change of current, didt=25 A/ms⇒e=Mdidt=92×10−6×2510−3=2.3 V

A primary coil and secondary coil are placed close to each other. A current, which changes at the rate of $25$ amp in a millisecond, is present in the primary coil. If the mutual inductance is $92 \times 10^{- 6} H$ , then the value of induced emf in the secondary coil is:

The correct option is B $2.3$ V
Mutual inductance, $M = 92 \times 10^{- 6} H$
Rate of change of current, $\frac{d i}{d t} = 25 A / m s$

$\Rightarrow e = M \frac{d i}{d t} = 92 \times 10^{- 6} \times \frac{25}{10^{- 3}} = 2.3 V$