Home
Class 12
PHYSICS
An air-cored solenoid with length 30 cm,...

An air-cored solenoid with length 30 cm, area of cross-section 25 `cm^(2)` and number of turns 500, carries a current of 2.5 A. The current is suddenly switched off in a brief time of `10^(-3)` s. How much is the average back emf induced across the ends of the open switch in the circuit? Ignore the variation in magnetic field near the ends of the solenoid.

Text Solution

Verified by Experts

The correct Answer is:
6.54V
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    AAKASH SERIES|Exercise Additional Exercise|11 Videos

  • ELECTROMAGNETIC INDUCTION

    AAKASH SERIES|Exercise Problems (Level-I)|28 Videos

  • ELECTRIC FIELD AND POTENTIAL

    AAKASH SERIES|Exercise PROBLEMS (LEVEL-II)|26 Videos

  • ELECTROMAGNETIC WAVES

    AAKASH SERIES|Exercise EXERCISE -II|22 Videos

Similar Questions

Explore conceptually related problems

An air cored solenoid with length 30 cm, area of cross-section 25 cm^(2) and number of turns 500 carries a current of 2.5 A . The current is suddenly switched off in a brief time of 10^(-3) s. How much is the average back e.m.f. induced across the ends of the open switch in the cuicuit ? Ignore the variation in magnetic field near the ends of the solenoid.

An air cored solenoid of length 50 cm and area of cross section 28 m^(2) has 200 turns and carries a current of 5.0 A. On switching off, the current decreases to across the ends of the solenoid. Find flux and emf induced if time is equal to 1.0 ms.

A closely wound solenoid of 750 turns and area of cross section of 5xx 10^(4)m^(2) carries a current of 3.0 A. Its associated magnetic moment is

A solenoid of length 0.6 m has a radius of 2 cm and is made up of 600 turns If it carries a current of 4 A, then the magnitude of the magnetic field inside the solenoid is

A long solenoid of 50 cm length having 100 turns carries a current of 2.5A. The magnetic field at centre of solenoid is:

A solenoid of length 0*5m has a radius of 1cm and is made up of 500 turns. It carries a current of 5A . What is the magnitude of the magnetic field inside the solenoid?

An air cored solenoid is of length 0.3 m, area of cross section 1.2 xx 10^(-3) m^(2) and has 2500 turns. Around its central section, a coil of 350 turns is wound. The solenoid and the coil are electrically insulated from eachother. Calculate the e.m.f. induced in the coil if the initial current of 3 A in the solenoid is reversed in 0.25 s.

A conducting wire of cross-sectional area 1 cm^(2) has 3 xx 10^(23) charge carriers per m3. If wire carries a current of 24 mA , then drift velocity of carriers is

A solenoid of 2m long & 3cm diameter has 5 layers of winding of 500 turns per metre length in each layer & carries a current of 5A. Find intensity of magnetic field at the centre of the solenoid.