Advertisements
Advertisements
Question
Explain the statement ‘the potential difference between two points is 1 volt’.
Solution
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.
RELATED QUESTIONS
By what other name is the unit joule/coulomb called?
Potential difference is measured in _________ by using a ___________ placed in ___________ across a component.
What do you understand by the term "electric potential"? (or potential) at a point? What is the unit of electric potential?
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?
Keeping the resistance constant, the potential difference applied across the ends of a component is halved. By how much does the current change?
A resistance of 20 ohms has a current of 2 amperes flowing in it. What potential difference is there between its ends?
Keeping the potential difference constant, the resistance of a circuit is doubled. By how much does the current change?
Keeping the potential difference constant, the resistance of a circuit is doubled. The current will become:
A current of 200 mA flows through a 4 kΩ resistor. What is the p.d. across the resistor?
In the circuit diagram given below, the current flowing across 5 ohm resistor is 1 amp. Find the current flowing through the other two resistors.
If the potential difference between the ends of a fixed resistor is halved, the electric power will become:
Write an expression for the electrical power spent in flow of current through a conductor in terms of resistance and potential difference.
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?
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 battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is:
100 J of heat is produced each second in a 4 Ω resistor. The potential difference across the resistor will be:
An electric charge always flows from a point at a ______ to a point at a ______.
Define Electric potential.
Inside a hollow charged spherical conductor, the potential ______
Study the following circuit and find:
- Effective resistance of the circuit
- Current drawn from the battery
- Potential difference across the 5 omega resistor
