Srijan Physics Class 9 for Students Practice FREE

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Srijan Physics Class 9. We covered all the Srijan Physics Class 9 MCQs in this post for free so that you can practice well for the exam.

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Srijan Physics Class 9 Objective for Students

A circular copper disc 10cm in diameter rotates at 1800 rev/minute about an axis through its center and at right angles to the disc. A uniform field of induction B of 1 weber/m² is perpendicular to the axis of the disc and its rim. Find the induced e.m.f.

A coil of 200 turns carrying a current of 10 amp produces a magnetic flux of 10 weber. Find the energy stored in a magnetic field.

A 20 Henry inductor carries a steady current of 2 amp. How can a 200-volt self-inductance e.m.f be made to appear in the inductor?

A solenoid with a length of 50 cm and having 500 turns and a radius of 2 cm is wound on an iron core of relative permeability 800. What will be the average e.m.f. induced in the solenoid if the current in it changes from 0 to 2 amp in 0.05 seconds?

Srijan Physics Class 9 Objective for Students

A circular copper disc 10cm in diameter rotates at 1800 rev/minute about an axis through its center and at right angles to the disc. A uniform field of induction B of 1 weber/m² is perpendicular to the axis of the disc and its rim. Find the induced e.m.f.

a. 0.0942 volt

b. 0.942 volt

c. 0.0094 volt

d. 9 volt

Option a – 0.0942 volt

A coil of 200 turns carrying a current of 10 amp produces a magnetic flux of 10 weber. Find the energy stored in a magnetic field.

a. 100 Joules

b. 1000 Joules

c. 10,000 Joules

d. 10 Joules

Option c – 10,000 Joules

A 20 Henry inductor carries a steady current of 2 amp. How can a 200-volt self-inductance e.m.f be made to appear in the inductor?

a. 10 amp/sec.

b. 100 amp/sec.

c. 0.01 amp/sec.

d. 1000 amp/sec.

Option a – 10 amp/sec

A solenoid with a length of 50 cm and having 500 turns and a radius of 2 cm is wound on an iron core of relative permeability 800. What will be the average e.m.f. induced in the solenoid if the current in it changes from 0 to 2 amp in 0.05 seconds?

a. 2.52 volts

b. 25.2 volts

c. 250 volts

d. None

Option b – 25.2 volts

We covered all the srijan physics class 9 mcqs above in this post for free so that you can practice well for the exam.

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Srijan Physics Class 9 Objective for Students

A circular copper disc 10cm in diameter rotates at 1800 rev/minute about an axis through its center and at right angles to the disc. A uniform field of induction B of 1 weber/m² is perpendicular to the axis of the disc and its rim. Find the induced e.m.f.

A coil of 200 turns carrying a current of 10 amp produces a magnetic flux of 10 weber. Find the energy stored in a magnetic field.

A 20 Henry inductor carries a steady current of 2 amp. How can a 200-volt self-inductance e.m.f be made to appear in the inductor?

A solenoid with a length of 50 cm and having 500 turns and a radius of 2 cm is wound on an iron core of relative permeability 800. What will be the average e.m.f. induced in the solenoid if the current in it changes from 0 to 2 amp in 0.05 seconds?

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