defence exam BSF Head Constable (RO/RM) Mock Test 2023 Physics Current, Resistance and Electricity Electric Current
An electric cell is connected to the bulb from its one end. The other end of both bulb and cell is open. Given, the connections are correct and bulb and cell both are in working conditions, which among the following will ensure that the bulb will not glow when it is connected across both open ends?
1
A steel spoon
2
A key
3
an silver wire
4
a wooden ruler