The magnetic moment of a diamagnetic atom is
The magnetic moment of a diamagnetic atom is
Options
(a) equal to zero (b) much greater than one (c) 1 (d) between zero and one
Correct Answer:
equal to zero
Explanation:
The magnetic […]
Physics
The magnetic susceptibility of a material of a rod is 299. Permeability of vacuum
The magnetic susceptibility of a material of a rod is 299. Permeability of vacuum μ₀ is 4πx10⁻⁷ Hm⁻¹. Absolute permeability of the material of the rod is
Options
(a) 3771×10⁻⁷ Hm⁻¹ (b) 3771×10⁻⁵ Hm⁻¹ […]
The conducting loop in the form of a circle is placed in a uniform magneitc field
The conducting loop in the form of a circle is placed in a uniform magneitc field with its plane perpendicular to the direction of the field. An emf will be induced in the loop,if
Two concentric coils each of radius equal to 2π cm are placed at right angles
Two concentric coils each of radius equal to 2π cm are placed at right angles to each other. If 3A and 4A are the currents flowing through the two coils, respectively. The magnetic induction (in […]
The intensity of magnetisation of a bar magnet is 5×10⁴ Am⁻¹. The magnetic length
The intensity of magnetisation of a bar magnet is 5×10⁴ Am⁻¹. The magnetic length and the area if cross- section of the magnet are 12 cm and 1 cm⁻² respectively. The magnitude of magnetic moment […]
Two parallel beams of positron moving in the same direction will
Two parallel beams of positron moving in the same direction will
Options
(a) not interact with each other (b) repel each other (c) attract each other (d) be deflected normal to the plane […]
A vibration magnetometer placed in magnetic meridian has a small bar magnet
A vibration magnetometer placed in magnetic meridian has a small bar magnet. The magnet executes oscillations with a time period of 2 sec in earth’s horizontal magnetic field of 24 microtesla. When a horizontal field […]
The value of workdone for rotating a magnet of magnetic moment M by an angle θ in external
The value of workdone for rotating a magnet of magnetic moment M by an angle θ in external magnetic field H is given by
Options
(a) MH cos θ (b) 2MH sin²(θ/2) (c) MH […]
A paramagnetic sample shows a net magnetisation of 0.8 Am⁻¹, when placed
A paramagnetic sample shows a net magnetisation of 0.8 Am⁻¹, when placed in an external magnetic field of strength 0.8 T at a temperature 5K. When the same sample is placed in an externel magnetic […]
A cyclotron is used to accelerate
A cyclotron is used to accelerate
Options
(a) Only negatively charged particles (b) neutron (c) Both positively and negatively charged particles (d) Only positively charged particles
Correct Answer:
Only positively charged particles
Explanation: […]