Similar charges _______________ each other whereas opposite charges ____________ each other.

Similar charges attract each other. ____________

(A) : If two beams of protons move parallel to each other in same direction then these beams repel each other. (R) : Like charges repel while opposite charges attract each other.

Two bar magnets are placed close to each other with their opposite poles facing each other. In absence of other forces, the magnets are pulled towards each other and their kinetc energy increases. Does it contradict our earlier knowledge that magnetic forces cannot do any work and hence cannot increase kinetic energy of a system?

Describe an experiment to show : like charges repel each other.

Figure D shows two spheres that initially have +4 and +8 positive charge. After an interaction (which could simply be that they touch each other), the yellow sphere has +10 positive charge, and the red sphere has an unknown quantity of charge. Use the law of conservation of charge to find the final charge on the red sphere.

A charges Q is placed at each of the two opposite corners of a square. A charge q is placed to each of the other two corners. If the resultant force on each charge q is zero, then

A charges Q is placed at each of the two opposite corners of a square. A charge q is placed to each of the other two corners. If the resultant force on each charge q is zero, then

A charge Q is place at each of the opposite corners of a square. A charge q is placed at each of the other two corners. If the net electrical force on Q is zero, then Q//q equals:

Describe an experiment to show : Unlike charges attract each other.

Two infinite linear charges are placed parallel to each other at a distance 0.1 m from each other. If the linear charge density on each is 5 mu C//m , then the force acting on a unit length of each linear charge will be: