A copper wire of radius 0.1mm and resistance `1k(Omega)`is connected across a power supply of 20 V.(a)How man electorns are transferred per second between the supply and the wire at one end?(b) Write down the current density in the wire.

A copper wire of radius 0.1mm and resistance 1k(Omega) is connected across a power supply of 20 V.(a)How many electrons are transferred per second between the supply and the wire at one end?(b) Write down the current density in the wire.

A copper wire of radius 0.1mm and resistance 1k(Omega) is connected across a power supply of 20 V.(a)How many electrons are transferred per second between the supply and the wire at one end?(b) Write down the current density in the wire.

A copper wire of radius 0.1 mm and resistance 1 k Omega is connected across a power supply of 20 V. (i) How many electrons are transferred per second between the supply and the wire at one end ? (ii) Write down the current density in the wire.

A thin copper rod of radius 1mm having an electrical resistance of 100 Omega is connected to battery of emf 12 volts and negligible internal resistance through a wire of negligible resistance. Calculate current density in the wire. Also , calculate the number of electrons entering one and of the rod per seconds.

A wire of length 1 m and radius 0.1mm gas a resistance of 100(Omega) .Find the resistivity of the material .

A wire of length 1 m and radius 0.1mm has a resistance of 100(Omega) .Find the resistivity of the material .

A wire of length 1 m and radius 0.1mm has a resistance of 100(Omega) .Find the resistivity of the material .

A conducting wire carrying 1 A of current is connected across a battery of 2V. Find the number of electrons flowing through the wire per second.