Two charged balls are suspended from a hinge by two threads of equal lengths. Mass of both the balls is 200 g. The amount of charges on both the balls is the same. At translational equilibrium, the balls are separated by a distance of 0.8 m, as shown in the given figure. What is the magnitude of charge on each ball?
4.33 µC
8.97 µC
17.16 µC
34.48 µC
Two charges, +2 µC and +8 µC, are placed 0.1 m apart. Another charge is placed between the two, which brings the system in equilibrium.What is the magnitude of the third charge?
0.75 µC
0.87 µC
2.50 µC
1.25 µC
Two positively charged particles, each carrying a charge of 3.6 × 10−8 C and having the same mass, are located at a distance of 0.1 m away from each other. If the electrostatic force on one of the charges is equal to its weight, then the mass of the system is :
1.019 g
1.182 g
0.854 g
0.238 g
There are three charges, , placed along a straight line of length 10 m, as shown in the given figure.
What is the net electrostatic force acting on charge q2?
12 × 10−3 N towards q1
28.5 × 10−3 N towards q1
12 × 10−3 N towards q3
28.5 × 10−3 N towards q3
Two point charges +1.5 µC and −0.5 µC are located 1 m apart. There is a point P on the line joining the charges where the net potential is zero. What is the distance of point P from charge +1.5 µC ?
0.50 m
0.75 m
0.35 m
0.25 m
A coil of resistance R and inductance L is connected to a battery of e.m.f. E volts. The final current in the coil is
What is the force between an electron and an alpha particle separated by a distance 2 Å?
5.76 × 10−9 N of attractive nature
5.76 × 10−9 N of repulsive nature
11.52 × 10−9 N of attractive nature
11.52 × 10−9 N of repulsive nature
Two charged particles are located at a distance of 1.5 m. The force of attraction between the charges is 2.1 × 10−7 N. One particle has a charge equal to two thirds the charge of another particle. What is the value of charges on the two particles?
Three charges are placed at the vertices of an equilateral triangle of side 0.2 m, as shown in the given figure. What is the magnitude of the net Coulomb force acting on charge q1 due to the other two charges?
2.26 N
3.92 N
4.52 N
7.47 N
Four charges q, 2q, 3q and 4q are located at the vertices of a square of side a (as shown in the given figure). k is the electrostatic constant. What is the sum of the magnitude of forces exerted on each charge?
