Question : At low temperatures, lead behaves as a:

Option 1: semiconductor

Option 2: superconductor

Option 3: insulator

Option 4: conductor

Question : Ice is packed in sawdust because

Option 1: sawdust will not get melted easily

Option 2: sawdust is a poor conductor of heat

Option 3: sawdust is a good conductor of heat

Option 4: sawdust does not stick to the ice

Question : A galvanometer can be converted into a voltmeter by connecting with it a

Option 1: high resistance in parallel

Option 2: low resistance on parallel

Option 3: high resistance in series

Option 4: low resistance in series

Question : Copper wires are generally used for electrical power transmission instead of iron wire because:

Option 1: Copper is cheaper than iron

Option 2: Copper is lighter than iron

Option 3: Copper is a good conductor of electricity than iron

Option 4: Copper can take higher power than iron

Question : Which one of the following is a good electrical conductor?

Option 1: Graphite

Option 2: Diamond

Option 3: peat

Option 4: charcoal