Which of the following materials is a good insulator?
...Which of the following materials is a good insulator?
Silver
Water
Rubber
Copper
Correct answer is C
Rubber is a good insulator because it does not allow electrons to flow through it easily. Copper, silver, and water are all good conductors of electricity.
An ammeter with a full scale deflection of 10mA has an internal resistance 0.5Ω. calculate ...
Which of the following statements is/are correct in any machine? I. The velocity ratio is usuall...
The quantity of heat needed to raise the temperature of a body by 1K is the body's ...
Which of the following are correct of plane- polarized light? I. Plane polarization of light is t...