Question

Which of the following can use in a tester along with a battery to detective a weak current in the circuit
(1)LED only
(2)A cool wounded over a compass needle only
(3)Bulb of 100 W only
(4)Either LED or a coil wounded over a compass needle

Answer 1

Answer:

Hey friend

The answer will be (4) Either LED or a coil wounded over a compass needle.

It is BECAUSE LED means Light Emitting Diode glow even when a small amount of current passes through it. And second is a coil wounded over a compass needle. If a small amount of current passes through it then the needle will show some deflection.

HOPE IT HELPS YOU...

Answer 2

$\huge{\underline{\underline{\mathfrak{Answer}}}}$

➡️Option (4) Either LED or a coil wounded over a compass needle.

➡️ BECAUSE LED means Light Emitting Diode glow even when a small amount of current passes through it. And second is a coil wounded over a compass needle. If a small amount of current passes through it then the needle will show some deflection.