A solenoid has $$2000$$ turns wound over a length of $$0.30$$ metre. The area of its $$cross-section$$ is $$1.2$$×$$10$$−$$3m2$$. Around its central section, a coil of $$300$$ turns is wound. If an initial current of $$2$$ A in the solenoid is reversed in $$0.25$$ $$sec$$, then the e.m.f. induced in the coil is

Question

A solenoid has $$2000$$ turns wound over a length of $$0.30$$ metre. The area of its $$cross-section$$ is  $$1.2$$×$$10$$−$$3m2$$. Around its central section, a coil of $$300$$ turns is wound. If an initial current of $$2$$ A in the solenoid is reversed in $$0.25$$ $$sec$$, then the e.m.f. induced in the coil is

Infinity Learn · Accepted Answer

Induced emf  $$e=Mdidt=$$μ$$0N1N2Al$$⋅$$didt=4$$π×$$10$$−$$7$$×$$2000$$×$$300$$×$$1.2$$×$$10$$−$$30.30$$×|$$2$$−$$($$−$$2)$$|$$0.25=48.2$$×$$10$$−$$3V=48mV$$

A solenoid has 2000 turns wound over a length of 0.30 metre. The area of its cross-section is $1 .2 \times 10^{- 3} m^{2}$ . Around its central section, a coil of 300 turns is wound. If an initial current of 2 A in the solenoid is reversed in 0.25 sec, then the e.m.f. induced in the coil is

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A solenoid has 2000 turns wound over a length of 0.30 metre. The area of its cross-section is 1.2×10−3m2. Around its central section, a coil of 300 turns is wound. If an initial current of 2 A in the solenoid is reversed in 0.25 sec, then the e.m.f. induced in the coil is

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Ready to Test Your Skills?

free study material

A solenoid has 2000 turns wound over a length of 0.30 metre. The area of its cross-section is $1 .2 \times 10^{- 3} m^{2}$ . Around its central section, a coil of 300 turns is wound. If an initial current of 2 A in the solenoid is reversed in 0.25 sec, then the e.m.f. induced in the coil is