An isolated conducting sphere is given a positive charge. Does its mass increases, decreases or remains the same?

How does population size increase or decrease?

When temperature of metal increases, does the resistance increases or decreases?

Can we increase/decrease the range of a given ammeter?

Two similar small metallic spheres are suspended by eal threads from the same point. When either sphere is given a similar charge of 36 statC. The distance between them is 6 cm. If the length of each thread is 5 cm, find the mass of each sphere and the tension in each thread.

Can we increase/decrease the range of a given voltmeter?

A uniformly charged conducting sphere of 2.8 m in diameter has a surface charge density of 100muCm^-2 . Find the charge on the sphere.

Does the ratio of neurtons to protons in a nucleus increase, decrease or remain the same after the emission of beta-particl es .

Does the ratio of neutrons to protons in a nucleus increase, decrease or remain the same after the emission of alpha-particl es .