- AGold is easily available in nature.
- BGold is malleable.
- CGold is conducting in nature.
- DGold is cheap.
Explanation:
Though gold is a costly metal it is used in electroscope because of the property malleability. This means very thin and light sheets can be formed from gold simply by hammering or rolling and hence the deflection of the light gold plates increases.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

A radio transmitter operates at a frequency of 880 kHz and a power of 10 kW. The number of photons emitted per second are
|
(a) 1.72 |
(b) 1327 |
(c) 13.27 |
(d) 0.075 |
In Young's double slit experiment, white light is used. The separation between the slits is b. The screen is at a distance d (d>> b) from the slits. Some wavelengths are missing exactly in front of one slit. These wavelengths are
|
(a) λ = |
(b) λ = |
(c) λ = |
(d) a, b |
A storage cell is charged by 5 amp D.C. for 18 hours. Its strength after charging will be
|
(a) 18 AH |
(b) 5 AH |
(c) 90 AH |
(d) 15 AH |
A cylindrical conductor has uniform cross-section. Resistivity of its material increase linearly from left end to right end. If a constant current is flowing through it and at a section distance x from left end, magnitude of electric field intensity is E, which of the following graphs is correct
|
(a) |
(b) |
(c) |
(d) |
The chemical equivalent of copper and zinc are 32 and 108 respectively. When copper and silver voltameter are connected in series and electric current is passed through for sometimes, 1.6 g of copper is deposited. Then, the mass of silver deposited will be
|
(a) 3.5 g |
(b) 2.8 g |
(c) 5.4 g |
(d) None of these |