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प्रश्न
Define the following:
Potential difference
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उत्तर
Potential difference: The potential difference between two points may be defined as the work done in moving a unit positive charge from one point to the other.
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संबंधित प्रश्न
Which of the following statements correctly defines a volt?
(a) a volt is a joule per ampere.
(b) a volt is a joule per coulomb.
What is meant by saying that the electric potential at a point is 1 volt?
A resistance of 20 ohms has a current of 2 amperes flowing in it. What potential difference is there between its ends?
Ohm's law state a relation between potential difference and ___________.
Keeping the potential difference constant, the resistance of a circuit is doubled. By how much does the current change?
A current of 200 mA flows through a 4 kΩ resistor. What is the p.d. across the resistor?
An electric bulb draws 0.5 A current at 3.0 V. Calculate the resistance of the filament of the bulb.
State Ohm’s law.
A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is:
A current of 1 ampere flows in a series circuit containing an electric lamp and a conductor of 5 Ω when connected to a 10 V battery. Calculate the resistance of the electric lamp.
Now if a resistance of 10 Ω is connected in parallel with this series combination, what change (if any) in current flowing through 5 Ω conductor and potential difference across the lamp will take place? Give reason.
