- AGreen, Red, black.
- BRed, Green, Black.
- CRed, Black, Green.
- DNone of the above.
Explanation:
The electric power line enters our house through three wires- namely the live wire, the neutral wire and the earth wire. To avoid confusion we follow a colour code for insulating these wires. The red wire is the live wire, and the black wire is neutral. The earth wire is given green plastic insulation. The colour coding of wires is green for earth red for live and black for neutral.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Two waves having intensity in the ratio 25 : 4 produce interference. The ratio of the maximum to the minimum intensity is
|
(a) 5 : 2 |
(b) 7 : 3 |
(c) 49 : 9 |
(d) 9 : 49 |
A battery of e.m.f. 10 V is connected to resistance as shown in figure. The potential difference between the points A and B is
|
(a) -2V |
(b) 2V |
(c) 5V |
(d) |
'Albedo' is
|
(a) Reflecting power of a heavenly body |
|
(b) Transmitive power of a heavenly body |
|
(c) Absorptive power of a heavenly body |
|
(d) Refracting power of a heavenly body |

Which of the following statement is true about magnetic moments of atoms of different elements
|
(a) All have a magnetic moment |
|
(b) None has a magnetic moment |
|
(c) All acquire a magnetic moment under external magnetic field and in same direction as the field |
|
(d) None of the above statements are accurate |