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Ashok0210

Asked: March 4, 2021In: Class 12 Physics

A circular coil of radius 8.0 cm and 20 turns is rotated about its vertical diameter with an angular speed of 50 rad s⁻¹ in a uniform horizontal magnetic field of magnitude 3.0xl0⁻² T. Obtain the maximum and average emfinduced in the coil. If the coil forms a closed loop of resistance 10Ω, calculate the maximum value of current in the coil. Calculate the average power loss due to Joule heating. Where does this power come from?

Class 12 Physics CBSE and UP Board Electromagnetic Induction Chapter-6 Exercise 6.6

Ashok0210

Asked: March 4, 2021In: Class 12 Physics

A 1.0 m long metallic rod is rotated with an angular frequency of 400 rad s⁻¹ about an axis normal to the rod passing through its one end. The other end of the rod is in contact with a circular metallic ring. A constant and uniform magnetic field of 0.5 T parallel to the axis exists everywhere. Calculate the emf developed between the centre and the ring.

Class 12 Physics CBSE and UP Board Electromagnetic Induction Chapter-6 Exercise 6.5

Ashok0210

Asked: March 4, 2021In: Class 12 Physics

A rectangular wire loop of sides 8 cm and 2 cm with a small cut is moving out of a region of uniform magnetic field of magnitude 0.3 T directed normal to the loop. What is the emf developed across the cut if the velocity of the loop is 1 cm s⁻¹ in a direction normal to the (a) longer side, (b) shorter side of the loop? For how long does the induced voltage last in each case?

Class 12 Physics CBSE and UP Board Electromagnetic Induction Chapter-6 Exercise 6.4

Ashok0210

Asked: March 4, 2021In: Class 12 Physics

A long solenoid with 15 turns per cm has a small loop of area 2.0 cm² placed inside the solenoid normal to its axis. If the current carried by the solenoid changes steadily from 2.0 A to 4.0 A in 0.1 s, what is the induced emf in the loop while the current is changing?

Class 12 Physics CBSE and UP Board Electromagnetic Induction Chapter-6 Exercise 6.3

Ashok0210

Asked: March 4, 2021In: Class 12 Physics

Use Lenz’s law to determine the direction of induced current in the situations described by Fig. 6.19: (a) A wire of irregular shape turning into a circular shape; (b) A circular loop being deformed into a narrow straight wire.

Use Lenz’s law to determine the direction of induced current in the situations described by Fig. 6.19: (a) A wire of irregular shape turning into a circular shape; (b) A circular loop being deformed into a narrow straight wire.

Class 12 Physics CBSE and UP Board Electromagnetic Induction Chapter-6 Exercise 6.2

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