The substance having infinitely high electrical resistance is called
Conductor
Resistor
Super conductor
Insulator
The electricity produced on rubbing is called
Current electricity
Static electricity
Induced electricity
All the above
The unit of electric charge is
Ampere
Newton
Coulomb
Joule
The potential difference or voltage between two points in a circuit is measured by
Ammeter
Volt meter
Galvanometer
Rheostat
Which of the following is an electrical device in which one part vibrates strongly when a current of electricity passes through it?
Diode
Buzzer
An insulator can be charged with
A cell
A battery
Which of the following is the process by which an object is connected to earth so as to neutralize its charge?
Conducting
Insulating
Earthing
Heating
Which of the following characteristic is not suitable for a fuse wire?
Thin and short
Thick and short
Low melting point
Higher resistance than rest of wiring
Which of the following has smallest resistance
Silver
Gold
Copper
Aluminium
An LED can emit
Red light
Yellow light
Green light
( A ), ( B ) or (C)
