Description : Name two good conductors, two good insulators, and two semiconductors.
Answer : In general all metals are good conductors, with silver the best and copper second.
Answer : Copper Silver Platinum Aluminium
Description : Magnetic materials (A) provide path to magnetic flux. (B) are good insulators. (C) are semiconductors. (D) None.
Answer : (A) provide path to magnetic flux.
Description : Ceramics are good (A) insulators. (B) conductors. (C) superconductors. (D) semiconductors.
Answer : (A) insulators.
Description : A bird sitting on a high tension electric wire does not get electrocuted because (1) it has high resistance (2) the body is earthed (3) it does not form a closed path for the flow of current (4) its feet are good insulators
Answer : it does not form a closed path for the flow of current