The main function of an _____ is to maintain a constant potential difference between its two terminals

Academic Physics NCERT Class 8

The main function of an electric cell is to maintain a constant potential difference between its two terminals.

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Updated on: 10-Oct-2022

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(a) Name a device which helps to maintain a potential difference across the ends of a conductor(b) What is meant by saying that the potential difference between two points is 1 V? (c) Define Ohm's law. Write an expression for it. (d) What is the unit of resistance? (e) When the potential difference between the terminals of an electric heater is 110 V, a current of 5 A flows through it. What current will flow through the heater if the potential difference is increased to 220 V ? What is the resistance of heater?
Name the device that helps to maintain a potential difference across a conductor.
What is meant by potential difference between two points?
How is a voltmeter connected in the circuit to measure the potential difference between two points?
1. Name a device that helps to maintain a potential difference across a conductor. 2. What is meant by saying that the potential difference between two points is 1 V?3. How much energy is given to each coulomb of charge passing through a 6 V battery?
(a) What do you understand by the term potential difference"?(b) What is meant by saying that the potential difference between two points is 1 volt?(c) What is the potential difference between the terminals of a battery if 250 joules of work is required to transfer 20 coulombs of charge from one terminal of battery to the other?(d) What is a voltmeter? How is a voltmeter connected in the circuit to measure the potential difference between two points. Explain with the help of a diagram.(e) State whether a voltmeter has a high resistance or a low resistance. Give reason for your answer."
What is the difference between 'electrostatic potential' and 'potential difference'.
Keeping the potential difference constant, the resistance of a circuit is halved. By how much does the current change?
What is the main difference between objects created using object literal and constructor function?
(a) What is spinal cord? What is its main function?(b) Give the functions of medulla.
The unit of potential difference is ____
a) Name a device which helps to maintain a potential difference across a conductor(say, a bulb).b) If a potential difference of 10V causes a current of 2 A to flow for 1 minute, how much energy is transferred?
What is the main function of the teeth?
How to write a JavaScript function to get the difference between two numbers?
A resistance of 20 ohms has a current of 2 amperes flowing in it. What potential difference is there between its ends?

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