Advertisements
Advertisements
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
You have three resistors of values 2Ω, 3Ω and 5Ω. How will you join them so that the total resistance is more than 7Ω?
1) Draw a diagram for the arrangement
2) Calculate the equivalent resistance.
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.
Potential difference is measured in _________ by using a ___________ placed in ___________ across a component.
Define the unit of resistance (or Define the unit "ohm").
For the circuit shown in the diagram below:
What is the value of:
(i) current through 6 Ω resistor?
(ii) potential difference across 12 Ω resistor?
If the potential difference between the ends of a fixed resistor is halved, the electric power will become:
A current of 1.6 mA flows through a conductor. If charge on an electron is –1.6 × 10-19 coulomb, find the number of electrons that will pass each second through the cross section of that conductor.
The device used for measuring potential difference is
A current of 0.2 A flows through a wire whose ends are at a potential difference of 15 V. Calculate:
(i) The resistance of the wire, and
(ii) The heat energy produced in 1 minute.
Calculate the current flowing through each of the resistors A and B in the circuit shown in the following figure.
What do you understand by the resistance of a wire?
A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance of 10m long wire of the same material but the double radius.
A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance if the wire is stretched to double its length?
Conceptual question.
Does a solar cell always maintain the potential across its terminals constant? Discuss
Which of the following represents voltage?
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:
Two charged spherical conductors of radius R1 and R2 are connected by a wire. Then the ratio of surface charge densities of the spheres `(σ_1//σ_2 )` is ______.
