The magnetic field due to a current carrying circular loop of radius 3 cm at a point
The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4 cm from the centre is 54 μT. What will be […]
Physics
The horizontal and vertical components of earth’s magnetic field at a place
The horizontal and vertical components of earth’s magnetic field at a place are 0.3 G and 0.52 G. The earth’s magnetic field and the angle of dip are
Options
(a) 0.3 G and δ=30⁰ […]
A compass needle which is allowed to move in a horizontal plane
A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole It:
Options
(a) will become rigid showing no movement (b) will stay in any position […]
The magnetic susceptibility is negative for
The magnetic susceptibility is negative for
Options
(a) Paramagnetic materials (b) Diamagnetic materials (c) Ferromagnetic materials (d) Paramagnetic and ferromagnetic materials
Correct Answer:
Diamagnetic materials
Explanation:
No explanation available. Be the first to […]
A short bar magnet of magnetic moment 0.4 JT⁻¹ is placed in a uniform magnetic field
A short bar magnet of magnetic moment 0.4 JT⁻¹ is placed in a uniform magnetic field of 0.16 T. The magnet is in stable equlibrium when the potential energy is
Options
(a) -0.064 […]
A toroid having 200 turns carries a current of 1 A. The average radius of the toroid
A toroid having 200 turns caries a current of 1 A. The average radius of the toroid is 10 cm. The magnetic field at any point in the open space inside the toroid is
There are four light-weight-rod samples A,B,C,D seperately suspended by threads
There are four light-weight-rod samples A,B,C,D separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted (i) A is feebly repelled (ii) B is feebly attracted […]
Two poles of same strength attract each other with a force of magnitude F
Two poles of same strength attract each other with a force of magnitude F when placed at the two corners of an equilateral triangle. If a north pole of same strength is placed at the […]
A thermoelectric refrigerator works on
A thermoelectric refrigerator works on
Options
(a) Joule effect (b) Seebeck effect (c) Peltier effect (d) Thermionic emission
Correct Answer:
Peltier effect
Explanation:
No explanation available. Be the first to write the explanation […]
A solenoid has length 0.4 cm, radius 1 cm and 400 turns of wire. If a current
A solenoid has length 0.4 cm, radius 1 cm and 400 turns of wire. If a current of 5 A is passed through this solenoid, then what is the magnetic field inside the solenoid?