- AUnder a tree
- BUnder a light post
- CHouse with lightning arrester
- DHigh wall
Explanation:
Lightning arrester arrests lightning and allows a safe path of electricity to ground. Thus it is a safe place inside a house that has a lightning arrester on the top of it. Else, electricity finds a high tower or tree or wall and travels through them to ground. Therefore these are not safe places to take shelter during lightning.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
and
are the electrical conductivities of Ge and Na respectively. If these substances are heated, then
|
(a) Both |
(b) |
|
(c) |
(d) Both |
A convex lens is in contact with concave lens. The magnitude of the ratio of their focal length is 2/3. Their equivalent focal length is 30 cm. What are their individual focal lengths
|
(a) – 75, 50 |
(b) – 10, 15 |
(c) 75, 50 |
(d) – 15, 10 |
If a power of 100 W is being supplied across a potential difference of 200 V, current flowing is
|
(a) 2 A |
(b) 0.5 A |
(c) 1 A |
(d) 20 A |