Principle of Superposition
What is electrostatic force?
Which of the following charge is not possible on a body?
(1) 1.6 x 10−18 C
(2) 1.6 x 10−20 C
(3) 1.6 x 10−14 C
(4) 1.6 x 10−5 C
Three equal charges, 2.0×10−6C Each are held fixed at the three corners of an equilateral triangle of side 5 cm. Find the coulomb forc eexperiencd by one of the charges due to the rest two
- Zero having no direction
- 8F towards +q charge
- 8F towards -q charge
- 4F towards +q charge
- acceleration due to gravity will be in the ratio 4:1
- acceleration due to gravity will be in the ratio 1:4
- escape velocities from their surfaces will be in the ratio √:1
- escape velocities from their surfaces will be in the ratio 1:√
Two small spheres, each of mass and carrying same charge of are suspended by threads of equal length from the same point. If the distance between the centers of the sphere is , then find out the angle made by the thread with the vertical. and
How do you find the electric field between two plates?
- +, -, +, -, +, -
- +, +, -, +, -, -
- -, +, +, -, +, -
- +, -, +, -, -, +
Two identical pith balls, each carrying a charge q, are suspended from a common point by two strings of equal length l. Find the mass of each ball if the angle between the strings is 2θ in equilibrium.
Three charges each of magnitude q are placed at the corners of an equilateral triangle, the electrostatic force on the charge placed at the center is: (each side of triangle is L)
- 14πεO3q2L2 \
Why cannot we obtain interference using two independent sources of light ?
- 125 dynes
- 35 dynes
- 25 dynes
What is the value of g at the center of the earth?
Four particles of masses m, 2m, 3m and 4m are kept in sequence at the corners of a square of side a. The magnitude of gravitational force acting on a particle of mass m placed at the centre of the square will be
Four particles having masses, m, 2m, 3m and 4m are placed at the four corners of a square of edge a. Find the gravitational force acting on a particle of mass m placed at the centre.
Four point charges qA=2μC, qB=−5μC, qC=2μC, and qD=−5μC are located at the corners of a square ABCD of side 10cm. What is the force on a charge of 1μC placed at the centre of the square?
- 32 V, 5 V
- 2 V, 8 V
- 5 V, 8 V
- 3 V, 5 V
- 2π√ s
- 2 s
- 2√ s
- √ s
How do you calculate the electric field between two charges?
Energy associated with a moving charge is due to
None of these
- TR2 is a constant
- TR is a constant
- TR is a constant
- T2R3 is a constant