A wire of length L metre carrying a current I ampere is bent in the form
A wire of length L metre carrying a current I ampere is bent in the form of a circle. The magnitude of th magnetic moment is
Options
(a) L²I²/4π (b) LI/4π (c) L²I/4π […]
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A particle with charge q is moving along a circle of radius R with unoform speed v.
A particle with charge q is moving along a circle of radius R with unoform speed v. The associated magnetic moment μ is given by
Options
(a) 1/2 v²R (b) 1/4 qvR (c) […]
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
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(a) 3771×10⁻⁷ Hm⁻¹ (b) 3771×10⁻⁵ Hm⁻¹ […]
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 […]
An astronomical telescope arranged for normal adjustment has a magnification of 6.
An astronomical telescope arranged for normal adjustment has a magnification of 6. If the length of the telescope is 35 cm, then the focal lengths of objective and eye-piece rspectively, are
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(a) […]
The nuclear fusion reaction between deutrium and tritium takes place
The nuclear fusion reaction between deutrium and tritium takes place
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(a) at low temperature and low pressure (b) at very high temperature and very high pressure (c) when the temperature is near […]
The capacitance of two concentric spherical shells of radii R₁ and R₂ (R₂>R₁) is
The capacitance of two concentric spherical shells of radii R₁ and R₂ (R₂>R₁) is
Options
(a) 4πε₀R₂ (b) 4πε₀(R₂-R₁)/R₁R₂ (c) 4πε₀R₁R₂/(R₂-R₁) (d) 4πε₀R₁
Correct Answer:
4πε₀R₁R₂/(R₂-R₁)
Explanation:
No explanation available. Be the first […]
For the action of a common Base (CB) transistor, (E=emitter, B= base, C= collector)
For the action of a common Base (CB) transistor, (E=emitter, B= base, C= collector) the required CB, EB junction bias conditions are
Options
(a) Both EB and CB junction forward bias (b) Both […]
An alternating emf given by equation e=300 sin[(100 π)t] V
An alternating emf given by equation e=300 sin[(100 π)t] V is applied to a resistance 100Ω. The rms current through the circuit is (in amperes)
Options
(a) 3/√2 (b) 9/√2 (c) 3 (d) […]
In Young’s double slit interference experiment, using two coherent waves
In Young’s double slit interference experiment, using two coherent waves of different amplitudes, the intensities ratio between bright and dark fringes is 3. Then, the valule of the wave amplitudes ratio heat arrive there is […]