Tiwari Academy Discussion

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

Answer the following questions: (a) A magnetic field that varies in magnitude from point to point but has a constant direction (east to west) is set up in a chamber. A charged particle enters the chamber and travels undeflected along a straight path with constant speed. What can you say about the initial velocity of the particle? (b) A charged particle enters an environment of a strong and non-uniform magnetic field varying from point to point both in magnitude and direction, and comes out of it following a complicated trajectory. Would its final speed equal the initial speed if it suffered no collisions with the environment? (c) An electron travelling west to east enters a chamber having a uniform electrostatic field in north to south direction. Specify the direction in which a uniform magnetic field should be set up to prevent the electron from deflecting from its straight line path.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.18 Additional Exercise

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

A toroid has a core (non-ferromagnetic) of inner radius 25 cm and outer radius 26 cm, around which 3500 turns of a wire are wound. If the current in the wire is 11 A, what is the magnetic field (a) outside the toroid, (b) inside the core of the toroid, and (c) in the empty space surrounded by the toroid.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.17 Additional Exercise

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

A long straight wire in the horizontal plane carries a current of 50 A in north to south direction. Give the magnitude and direction of B at a point 2.5 m east of the wire.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.3 NCERT Solutions Class 12 Physics Chapter 4 Question 3

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 20 cm from the wire?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.2 NCERT Solutions Class 12 Physics Chapter 4 Question 2

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.1 NCERT Solutions Class 12 Physics Chapter 4 Question 1

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

A magnetic field of 100 G (1 G = 10⁻⁴ T) is required which is uniform in a region of linear dimension about 10 cm and area of cross-section about 10⁻³ m² . The maximum current-carrying capacity of a given coil of wire is 15 A and the number of turns per unit length that can be wound round a core is at most 1000 turns m⁻¹. Suggest some appropriate design particulars of a solenoid for the required purpose. Assume the core is not ferromagnetic.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.15 Additional Exercise NCERT Solutions Class 12 Physics Chapter 4 Question 15

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

A long straight wire in the horizontal plane carries a current of 50 A in north to south direction. Give the magnitude and direction of B at a point 2.5 m east of the wire.

A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 20 cm from the wire?

A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?

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.

Which is the best website providing NCERT Solutions?

NCERT Books

Where can I get NCERT books in PDF format?

NIOS

NCERT Solutions

Sign Up

Sign In

Forgot Password

Tiwari Academy Discussion Latest Questions