Which one of the following is true according to Ohm's law?

Insulators like wood and rubber have a very low electrical resistance.

Define one watt hour.

$(a)$ Why is the series arrangement not used for domestic circuits?
$(b)$ Why is tungsten used almost exclusively for the filament of electric lamps?
$(c)$ Why are the conductors of electric heating devices,such as bread toasters and electric irons,made of an alloy rather than a pure metal?
$(d)$ Why are copper and aluminium wires usually employed for electricity transmission?
$(e)$ Why does the cord of an electric heater not glow while the heating element does?

How is a voltmeter connected in a circuit?

What is the direction of conventional current?