- Acharging of a body with a positive charge
- Bproduction of current by relative motion between a magnet and a coil
- Crotation of the coil of an electric motor
- Dgeneration of magnetic field due to a current carrying solenoid
Explanation:
Electromagnetic induction is the production of current by relative motion between a magnet and a coil.The phenomenon of producing electric current in a conductor by moving it perpendicular to a magnetic field or vice -versa, is called electro magnetic induction.
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In a Young's double slit experiment, the fringe width will remain same, if (D = distance between screen and plane of slits, d = separation between two slits and λ = wavelength of light used)
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(a) Both λ and D are doubled |
(b) Both d and D are doubled |
|
(c) D is doubled but d is halved |
(d) λ is doubled but d is halved |
Beams of light are incident through the holes A and B and emerge out of the box through the holes C and D respectively as shown in the Figure. Which of the following could be inside the box?
Which of the following shows green house effect
|
(a) Ultraviolet rays |
(b) Infrared rays |
(c) X-rays |
(d) None of these |
If a diamagnetic solution is poured into a U-tube and one arm of this U-tube placed between the poles of a strong magnet with the meniscus in a line with the field, then the level of the solution will
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(a) Rise |
(b) Fall |
(c) Oscillate slowly |
(d) Remain as such |
An isolated solid metallic sphere is given +Q charge. The charge will be distributed on the sphere
|
(a) Uniformly but only on surface |
|
(b) Only on surface but non-uniformly |
|
(c) Uniformly inside the volume |
|
(d) Non-uniformly inside the volume |