- AThe electric force between them increases.
- BThe electric force between them decreases.
- CThe net downward force will increase.
- DThe net downward force will remain unchanged.
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The length of a given cylindrical wire is increased by 100 %. Due to the consequent decrease in diameter the change in the resistance of the wire will be
|
(a) 300 % |
(b) 200 % |
(c) 100 % |
(d) 50 % |
A parallel plate capacitor has capacitance C. If it is equally filled with parallel layers of materials of dielectric constants K1 and K2 its capacity becomes C1. The ratio of C1 to C is
|
(a) |
(b) |
(c) |
(d) |
A wire is broken in four equal parts. A packet is formed by keeping the four wires together. The resistance of the packet in comparison to the resistance of the wire will be
|
(a) Equal |
(b) One fourth |
(c) One eight |
(d) |
For uranium nucleus how does its mass vary with volume
|
(a) m ∝ V |
(b) m ∝ 1/V |
(c) m ∝ |
(d) m ∝ |