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Ashok0210

Asked: February 23, 2021In: Class 12 Physics

Two concentric circular coils X and Y of radii 16 cm and 10 cm, respectively, lie in the same vertical plane containing the north to south direction. Coil X has 20 turns and carries a current of 16 A; coil Y has 25 turns and carries a current of 18 A. The sense of the current in X is anticlockwise, and clockwise in Y, for an observer looking at the coils facing west. Give the magnitude and direction of the net magnetic field due to the coils at their centre.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.14 Additional Exercise NCERT Solutions Class 12 Physics Chapter 4 Question 14

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

(a) A circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of 60º with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning. (b) Would your answer change, if the circular coil in (a) were replaced by a planar coil of some irregular shape that encloses the same area? (All other particulars are also unaltered.)

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.13 NCERT Solutions Class 12 Physics Chapter 4 Question 13

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

In Exercise 4.11 obtain the frequency of revolution of the electron in its circular orbit. Does the answer depend on the speed of the electron? Explain.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.12 NCERT Solutions Class 12 Physics Chapter 4 Question 12

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

In a chamber, a uniform magnetic field of 6.5 G (1 G = 10⁻⁴ T) is maintained. An electron is shot into the field with a speed of 4.8 × 10⁶ m s⁻¹ normal to the field. Explain why the path of the electron is a circle. Determine the radius of the circular orbit. (e = 1.6 × 10⁻¹⁹ C, me = 9.1×10⁻³¹ kg)

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.11 NCERT Solutions Class 12 Physics Chapter 4 Question 11

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

Two moving coil meters, M₁ and M₂ have the following particulars: R₁ = 10 Ω, N₁ = 30, A₁ = 3.6 × 10⁻³m², B₁ = 0.25 T R₂ = 14 Ω, N₂ = 42, A₂ = 1.8 × 10⁻³ m² , B₂ = 0.50 T (The spring constants are identical for the two meters). Determine the ratio of (a) current sensitivity and (b) voltage sensitivity of M₂ and M₁.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.10 NCERT Solutions Class 12 Physics Chapter 4 Question 10

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

A square coil of side 10 cm consists of 20 turns and carries a current of 12 A. The coil is suspended vertically and the normal to the plane of the coil makes an angle of 30º with the direction of a uniform horizontal magnetic field of magnitude 0.80 T. What is the magnitude of torque experienced by the coil?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.9 NCERT Solutions Class 12 Physics Chapter 4

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm. If the current carried is 8.0 A, estimate the magnitude of B inside the solenoid near its centre.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.8 NCERT Solutions Class 12 Physics Chapter 4

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

Two long and parallel straight wires A and B carrying currents of 8.0 A and 5.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire A.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.7

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

A 3.0 cm wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27 T. What is the magnetic force on the wire?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.6

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

What is the magnitude of magnetic force per unit length on a wire carrying a current of 8 A and making an angle of 30º with the direction of a uniform magnetic field of 0.15 T?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.5

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Taija

In Exercise 4.11 obtain the frequency of revolution of the electron in its circular orbit. Does the answer depend on the speed of the electron? Explain.

A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm. If the current carried is 8.0 A, estimate the magnitude of B inside the solenoid near its centre.

Two long and parallel straight wires A and B carrying currents of 8.0 A and 5.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire A.

A 3.0 cm wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27 T. What is the magnetic force on the wire?

What is the magnitude of magnetic force per unit length on a wire carrying a current of 8 A and making an angle of 30º with the direction of a uniform magnetic field of 0.15 T?

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