In order to make an electromagnet you need a
A). Dry cell batteries
B). Thin coated copper wire
C). Iron nail
D). All of the above
All of the above
In order to make an electromagnet you need a dry cell batteries, thin coated copper wire and iron nail.
1. Minimum number of unequal vectors which can give zero resultant are
2. Which one among the following doesn't have any effect on velocity of sound ?
3. A small drop of oil spreads over water because :
5. The energy emitted by the Sun is due to
6. In general, which is the cause of a sea breeze?
7. A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps