Question

A and B are two device. Both these devices have terminals each. If the two terminals
of device A are connected directly by a wire nothing happens but when the two
terminal of device B are connected by a wire directly, it gets damaged quickly. When
the two terminals of device B are connected to the 2 terminals of A, by copper wire,
then part C of device A get heated and glow to produce light.
a) What would be device A and device B?
b) Name the part C of device A
c) In which device, A or B the 2 terminals are marked (+) and (-)?​

Answer 1

C of device A get heated and glow to produce light.

a) What would be device A and device B?

b) Name the part C of device A

c) In which device, A or B the 2 terminals are marked (+) and (-)?