Wind is one of the source of electric current. Which energy is used to rotate the blades of windmills?
Kinetic energy
Potential energy
Solar energy
None of these
A fuse wire is made of
60% lead and made 40% tin
30% lead and 70% copper
30% copper and 70% lead
60% tin and 40% lead
Insulators have very high
Resistivity
e.m.f.
Conductivity
Potential difference
The colour code for neutral wire is
Black or blue
Red or black
Green or yellow
Green or black
The symbol represents a
Open switch
Connecting wire
Closed switch
Cell
An electric iron consist of a heating filament made of
Magnesium wire
Nichrome wire
Tongs ton wire
Neon wire
The colour of live wire is
Red or brown
Yellow or Red
The potential difference between live wire and the neutral wire is
120v
240v
220v
250v
Living plants are
Conductors
Insulators
Semi conductors
The obstruction to the flow of electric current is called
Potential
Charge
Resistance
