- A[M L T-2]
- B[M0 L0 T0 A1]
- C[M L3 T0]
- D[M L2 T-3]
Explanation:
The flow of charge per unit time is defined as current. The fundamental unit of current is Ampere (named after Andre Marie Ampere).
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A light wave has a frequency of 4
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meters in a medium. The refractive index of the medium is
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(a) 1.5 |
(b) 1.33 |
(c) 1.0 |
(d) 0.66 |
A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is:
A vertical wire kept in Z-X plane carries a current from Q to P (see figure). The magnetic field due to current will have the direction at the origin O along
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(a) OX |
(b) |
(c) OY |
(d) |
The field normal to the plane of a wire of n turns and radius r which carries a current i is measured on the axis of the coil at a small distance h from the centre of the coil. This is smaller than the field at the centre by the fraction
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(a) |
(b) |
(c) |
(d) |
A bar magnet of magnetic moment
is placed in a magnetic field of induction
. The torque exerted on it is
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(a) |
(b) - |
(c) |
(d) |
One cannot see through fog because .......... :
For copper-iron (Cu-Fe) couple, the thermo e.m.f. (temperature of cold junction = 0℃) is given by E = (14θ – 0.02)μV. The neutral temperature will be
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(a) 350 ℃ |
(b) 350 K |
(c) 560℃ |
(d) 560 K |