Vanishree

Ashok0210

Asked: March 4, 2021In: Class 12 Physics

Suppose the loop in Exercise 6.4 is stationary but the current feeding the electromagnet that produces the magnetic field is gradually reduced so that the field decreases from its initial value of 0.3 T at the rate of 0.02 T s⁻¹. If the cut is joined and the loop has a resistance of 1.6Ω how much power is dissipated by the loop as heat? What is the source of this power?

Class 12 Physics CBSE and UP Board Electromagnetic Induction Chapter-6 Exercise 6.11 Additional Exercise NCERT Solutions for Class 12 Physics Chapter 6 Question 11

Ashok0210

Asked: March 4, 2021In: Class 12 Physics

A square loop of side 12 cm with its sides parallel to X and Y axes is moved with a velocity of 8 cm s⁻¹ in the positive x-direction in an environment containing a magnetic field in the positive z-direction. The field is neither uniform in space nor constant in time. It has a gradient of 10⁻³T cm⁻¹ along the negative x-direction (that is it increases by 10⁻³T cm⁻¹ as one moves in the negative x-direction), and it is decreasing in time at the rate of 10⁻³T s⁻¹. Determine the direction and magnitude of the induced current in the loop if its resistance is 4.50 mΩ..

Class 12 Physics CBSE and UP Board Electromagnetic Induction Chapter-6 Exercise 6.12 Additional Exercise NCERT Solutions for Class 12 Physics Chapter 6 Question 12

Ashok0210

Asked: March 4, 2021In: Class 12 Physics

A jet plane is travelling towards west at a speed of 1800 km/h. What is the voltage difference developed between the ends of the wing having a span of 25 m, if the Earth’s magnetic field at the location has a magnitude of 5 x 10⁻⁴ T and the dip angle is 30°.

Class 12 Physics CBSE and UP Board Electromagnetic Induction Chapter-6 Exercise 6.10 NCERT Solutions for Class 12 Physics Chapter 6 Question 10

Ashok0210

Asked: March 4, 2021In: Class 12 Physics

A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 s, what is the change of flux linkage with the other coil?

Class 12 Physics CBSE and UP Board Electromagnetic Induction Chapter-6 Exercise 6.9 NCERT Solutions for Class 12 Physics Chapter 6 Question 9

Ashok0210

Asked: March 4, 2021In: Class 12 Physics

Current in a circuit falls from 5.0 A to 0.0 A in 0.1 s. If an average emf of 200 V induced, give an estimate of the self-inductance of the circuit

Class 12 Physics CBSE and UP Board Electromagnetic Induction Chapter-6 Exercise 6.8 NCERT Solutions for Class 12 Physics Chapter 6 Question 8

Ashok0210

Asked: March 4, 2021In: Class 12 Physics

A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5.0 m s⁻¹ at right angles to the horizontal component of the earth’s magnetic field, 0.30 x 10⁻⁴ Wb m⁻². (a) What is the instantaneous value of the emf induced in the wire? (b) What is the direction of the emf? (c) Which end of the wire is at the higher electrical potential?

Class 12 Physics CBSE and UP Board Electromagnetic Induction Chapter-6 Exercise 6.7 NCERT Solutions for Class 12 Physics Chapter 6 Question 7

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

Vanishree

A jet plane is travelling towards west at a speed of 1800 km/h. What is the voltage difference developed between the ends of the wing having a span of 25 m, if the Earth’s magnetic field at the location has a magnitude of 5 x 10⁻⁴ T and the dip angle is 30°.

A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 20 A in 0.5 s, what is the change of flux linkage with the other coil?

Current in a circuit falls from 5.0 A to 0.0 A in 0.1 s. If an average emf of 200 V induced, give an estimate of the self-inductance of the circuit

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?

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