Moving Charges and Magnetism questions
775 published questions with worked solutions.
- The magnetic lines of force
- A magnetic dipole of moment M is placed in uniform magnetic field B so that angle between direction of M and B is , the torque...
- Magnetic field do not interact with:
- The torque acting on the coil become equal to the magnetic moment if its axis is inclined to unit magnetic induction at an angle...
- A current carrying loop is placed in uniform magnetic field. The torque acting in it does not depend upon:
- If a circular coil of area A, number of turns n carries a current I then it is equivalent to a magnetic dipole. The magnetic...
- A current loop placed in a magnetic field behaves like a
- Magnetic dipole moment of a current-carrying coil is independent of
- A current of 10 A is flowing through a circular coil of 5 turns, each of radius 7 cm. The coil lies in the X-Y plane. What is the...
- Two identical pieces of metal wires are used to make a circular loop and a square loop. Same current is passed through both the...
- A circular coil of radius 10 cm and 100 turns carries a current 1 A. What is the magnetic moment of the coil? [CBSE PMT 2000]
- A bar magnet has coercivity 4 10^ 3 A ,m^ -1 . It is desired to demagnetise it by inserting it inside a solenoid 12 cm long and...
- A toroid has 1500 turns and the inner and outer radii of its core 6 cm and 8 cm respectively. The magnetic field in the core for...
- A bar magnet having coercivity 4 10^ 3 Am^ -1 is demagnetised by inserting it inside a solenoid 10 cm long and having 50 turns....
- The magnetic moment of current carrying circular coil of radius r and number of turns n varies as
- A closely wound solenoid of 800 turns and area of cross-section 2.5 10^ -4 m^2 carries a current of 3.0 A. What is its associated...
- The core of a toroid having 3000 turns has inner and outer radii 11 cm and 12 cm, respectively. The magnetic field in the core...
- The magnetic field (B) inside a long solenoid having n turns per unit length and carrying current i when iron core is kept in it...
- If in a galvanometer the coil is wound on a bad conductor, the eddy current will be
- In order to make a suspended type of M.C.G. dead beat, eddy currents are developed by:
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