- APositive
- BNegative
- CZero
- DDepends on the field direction
Explanation:
Work done is given difference in potentials. In an equipotential surface, all points will have same potential. Thus work done is zero
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When a semiconductor is heated, its resistance
|
(a) Decreases |
(b) Increases |
(c) Remains unchanged |
(d) Nothing is definite |
Two free parallel wires carrying currents in opposite direction
| (a) Attract each other |
| (b) Repel each other |
| (c) Neither attract nor repel |
| (d) Get rotated to be perpendicular to each other |
The wavelength of light diminishes μ times (μ = 1.33 for water) in a medium. A diver from inside water looks at an object whose natural colour is green. He sees the object as
|
(a) Green |
(b) Blue |
(c) Yellow |
(d) Red |
Three resistors are connected to form the sides of a triangle ABC, the resistance of the sides AB, BC and CA are 40 ohms, 60 ohms and 100 ohms respectively. The effective resistance between the points A and B in ohms will be
|
(a) 32 |
(b) 64 |
(c) 50 |
(d) 200 |
In the nth orbit, the energy of an electron
for hydrogen atom. The energy required to take the electron from first orbit to second orbit will be
|
(a) 10.2 eV |
(b) 12.1 eV |
(c) 13.6 eV |
(d) 3.4 eV |