Advertisements
Advertisements
Question
Two points A and B are maintained at a potential of 7 V and -4 V respectively. The work done in moving 50 electrons from A to B is ______.
Options
8.80 × 10-17 J
- 8.80 × 10-17 J
4.40 × 10-17 J
5.80 × 10-17 J
Advertisements
Solution
Two points A and B are maintained at a potential of 7 V and -4 V respectively. The work done in moving 50 electrons from A to B is 8.80 × 10-17 J.
APPEARS IN
RELATED QUESTIONS
Which charge configuration produces a uniform electric field?
Give the relation between electric field and electric potential.
What is meant by electrostatic energy density?
Derive an expression for electrostatic potential due to a point charge.
Derive an expression for electrostatic potential energy of the dipole in a uniform electric field.
The total number of electrons in the human body is typically in the order of 1028. Suppose, due to some reason, you and your friend lost 1% of this number of electrons. Calculate the electrostatic force between you and your friend separated at a distance of lm. Compare this with your weight. Assume the mass of each person is 60kg and use point charge approximation.
Five identical charges Q are placed equidistant on a semicircle as shown in the figure. Another point charge q is kept at the center of the circle of radius R. Calculate the electrostatic force experienced by the charge q.

Suppose a charge +q on Earth’s surface and another +q charge is placed on the surface of the Moon,
- Calculate the value of q required to balance the gravitational attraction between Earth and Moon
- Suppose the distance between the Moon and Earth is halved, would the charge q change?
(Take mE = 5.9 x 1024 kg, mM = 7.348 x 1022 kg)
Draw the free body diagram for the following charges as shown in the following figure.

Draw the free body diagram for the following charges as shown in the following figure.

