Advertisements
Advertisements
प्रश्न
Define the term resistivity.
Advertisements
उत्तर
The resistivity of a material is the resistance of a wire of that material of unit length and unit area of cross-section.
संबंधित प्रश्न
How many microamperes are there in 1 ampere?
One coulomb of charge flows through any cross-section of a conductor in 1 second. What is the current flowing through the conductor?
Which effect of current is utilised in the working of an electric fuse?
Distinguish between an open and a closed circuit.
If a fuse contains a 5 A fuse wire and the voltage is 240 V, what is the maximum power (wattage) which may be taken from the circuit?
An electric bulb is rated '100 W, 250 V'. How much current will the bulb draw if connected to a 250 V supply?
An electrical gadget can give an electric shock to its user under certain circumstances. Mention any two of these circumstances.
Three resistances, of which two are equal when connected in series have an effective resistance of 30 ohms. When the three resistances are connected in parallel, the effective resistances is 3 ohms. Find the values of the individual resistances.
A current of 2A passing through the conductor produces 80 J of heat in 10 seconds. The resistance of the conductor is ______.
