Advertisements
Advertisements
प्रश्न
Write an expression for the electrical power spent in flow of current through a conductor in terms of current and resistance.
Advertisements
उत्तर
Electrical Power, P = I2R
APPEARS IN
संबंधित प्रश्न
What do you understand by the term "electric potential"? (or potential) at a point? What is the unit of electric potential?
Name a device that help to measure the potential difference across a conductor.
What is a voltmeter?
Keeping the potential difference constant, the resistance of a circuit is halved. By how much does the current change?
What is Ohm's law? Explain how it is used to define the unit of resistance.
A current of 200 mA flows through a 4 kΩ resistor. What is the p.d. across the resistor?
In the circuit shown below:
The potential difference across the 3 Ω resistor is:
Electric cells having 2V potential difference each have been connected in the form of a battery. What will be the total potential difference of the battery in both cases?
What would you suggest to a student if while performing an experiment he finds that the pointer/needle of the ammeter and voltmeter do not coincide with the zero marks on the scales when the circuit is open? No extra ammeter/voltmeter is available in the laboratory.
State Ohm’s law.
