A man is moving towards a wall with a source of sound in his hand. Frequency of source = 50Hz. Speed of man = 8m/s. If the man sends one pulse of sound, what will be the frequency heard by him after sound reflects off the wall? Speed of sound = 330m/s.

The attraction is the real proof of an object being charged.

Why is gold used in the Gold-leaf electroscope?

What happens to the plates of the apparatus if we measure alternating charge using a Gold-leaf oscilloscope?

Dr. Gilbert tried to hold a brass rod by hand and induce static electricity in it by friction. Why did he fail?

Gold-leaf electroscope can be used _______

Two equally charged spheres attract each other. Now if they touch each other then they will _____

Current carrier in conductors is ____

Which group among the following is insulator?

The band gap between the valence band and conduction band is the measure of ______

A static electricity experiment can be performed properly in any season. The statement is ______