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Ashok0210

Asked: February 24, 2021In: Class 12 Physics

A bar magnet of magnetic moment 1.5 J T⁻¹ lies aligned with the direction of a uniform magnetic field of 0.22 T. (a) What is the amount of work required by an external torque to turn the magnet so as to align its magnetic moment: (i) normal to the field direction, (ii) opposite to the field direction? (b) What is the torque on the magnet in cases (i) and (ii)?

Class 12 Physics CBSE and UP Board Magnetism and Matter Chapter-5 Exercise 5.7 NCERT Solutions for Class 12 Physics Chapter 5 Question 7

Ashok0210

Asked: February 24, 2021In: Class 12 Physics

If the solenoid in Exercise 5.5 is free to turn about the vertical direction and a uniform horizontal magnetic field of 0.25 T is applied, what is the magnitude of torque on the solenoid when its axis makes an angle of 30° with the direction of applied field?

Class 12 Physics CBSE and UP Board Magnetism and Matter Chapter-5 Exercise 5.6 NCERT Solutions for Class 12 Physics Chapter 5 Question 6

Ashok0210

Asked: February 24, 2021In: Class 12 Physics

A closely wound solenoid of 800 turns and area of cross section 2.5 × 10⁻⁴ m² carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?

Class 12 Physics CBSE and UP Board Magnetism and Matter Chapter-5 Exercise 5.5 NCERT Solutions for Class 12 Physics Chapter 5 Question 5

Ashok0210

Asked: February 24, 2021In: Class 12 Physics

A short bar magnet of magnetic moment m = 0.32 JT⁻¹ is placed in a uniform magnetic field of 0.15 T. If the bar is free to rotate in the plane of the field, which orientation would correspond to its (a) stable, and (b) unstable equilibrium? What is the potential energy of the magnet in each case?

Class 12 Physics CBSE and UP Board Magnetism and Matter Chapter-5 Exercise 5.4 NCERT Solutions for Class 12 Physics Chapter 5 Question 4

Ashok0210

Asked: February 24, 2021In: Class 12 Physics

A short bar magnet placed with its axis at 30º with a uniform external magnetic field of 0.25 T experiences a torque of magnitude equal to 4.5 × 10⁻² J. What is the magnitude of magnetic moment of the magnet?

Class 12 Physics CBSE and UP Board Magnetism and Matter Chapter-5 Exercise 5.3 NCERT Solutions for Class 12 Physics Chapter 5 Question 3

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