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प्रश्न
Explain the statement ‘the potential difference between two points is 1 volt’.
उत्तर
One volt is the potential difference between two points in an electric circuit when 1 joule of work is done to move a charge of 1 coulomb from one point to other.
संबंधित प्रश्न
What is meant by saying that the potential difference between two points is 1 V?
The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below:
| I (amperes) | 0.5 | 1.0 | 2.0 | 3.0 | 4.0 |
| V (volts) | 1.6 | 3.4 | 6.7 | 10.2 | 13.2 |
Plot a graph between V and I and calculate the resistance of that resistor.
State two causes of energy loss in a transformer.
Calculate the quantity of heat produced in a 20 Ω resistor carrying 2.5 A current in 5 minutes.
What is the SI unit of potential difference?
Potential difference is measured in _________ by using a ___________ placed in ___________ across a component.
The p.d. across a lamp is 12 V. How many joules of electrical energy are changed into heat and light when:
a charge of 1 C passes through it?
A current of 5 amperes flows through a wire whose ends are at a potential difference of 3 volts. Calculate the resistance of the wire.
Keeping the potential difference constant, the resistance of a circuit is doubled. By how much does the current change?
Calculate the power used in the 2 Ω resistor in each of the following circuits: a 4 V battery in parallel with 12 Ω and 2 Ω resistors.
State the S.I. unit of electric potential.
Calculate the potential difference between the two terminals of a battery if 100 joules of work is required to transfer 20 coulombs of charge from one terminal of the battery to the other.
Define the following:
Potential difference
Write an expression for the electrical power spent in flow of current through a conductor in terms of current and resistance.
Draw a graph of Potential difference (V) versus Current (I) for an ohmic resistor. How can you find the resistance of the resistor from this graph?
A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is:
If P and V are the power and potential of device, the power consumed with a supply potential V1 is:
100 J of heat is produced each second in a 4 Ω resistor. The potential difference across the resistor will be:
A cylindrical conductor of length l and uniform area of cross section A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross section
