Q.11)-The substance having infinite electric resistance are called
- Conductor
- Insulator
- Resistor
- Electrolyte
Q.12)-What is the conductivity of super conductor?
- Zero
- Infinite
- Less
- More
Q.13)-What is the resistance of an ideal voltmeter?
- Infinite
- Zero
- High
- Low
Q.14)-Magnetic keeper are the pieces of
- Nickel
- Cobalt
- Iron
- Soft iron
Q.15)-Device used to convert A.C. into D.C. known as
- Dynamo
- Inductive coil
- Generator
- Rectifier
Q.16)-The solids which conducts the electricity at high temperature but not at low temperature are called
- Super conductor
- Semi conductor
- Metallic conductor
- Insulator
Q.17)-Which of the following is a conductor of electricity?
- Rubber
- Pure water
- Salt water
- Benzene
Q.18)-The metal used in wires at domestic level
- Nickel
- Aluminium
- Iron
- Copper
Q.19)-Fuse wire used as a safety device in domestic electrical appliances is made up of metal having
- Low resistance
- Low melting point
- Low conductivity
- Low specific gravity
Q.20)-For which of the following Ohm's law is correctly applicable/
- Insulator
- Semi conductor
- Conductor
- Super conductor
