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प्रश्न
What do you understand by the resistance of a wire?
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उत्तर
The obstruction offered in the flow of electrons (or current) by the material of the wire, is called its resistance.
संबंधित प्रश्न
Calculate the quantity of heat produced in a 20 Ω resistor carrying 2.5 A current in 5 minutes.
What is a voltmeter?
Name a device which helps to maintain potential difference across a conductor (say, a bulb).
Calculate the power used in the 2 Ω resistor in each of the following circuits: a 6 V battery in series with 1 Ω and 2 Ω resistors.
100 joules of heat is produced per second in a 4 ohm resistor. What is the potential difference across the resistor?
Define the term ‘volt’.
The differences between the electrostatic potential of the positive and the negative end of an electric cell is the ______ of the cell.
Exercise.
Calculate the amount of charge that would flow in 2 hours through an element of an electric bulb drawing a current of 2.5 A.
A negative charge will move from ______ to ______ potential.
