In lightning, air in the vicinity is heated to a temperature of ……….◦C which is about three times of temperature of Sun’s surface.
a) 3000
b) 20000
c) 30000
d) 400
Electric Resistance:
Electrical Resistance is an electrical quantity
that measures how the device or material reduces the electric current flow
through it. The resistance is measured in units of ohms (Ω). If we make an
analogy to water flow in pipes, the resistance is bigger when the pipe is
thinner, so the water flow is decreased.
The opposition
to the motion of charge through a material is called electric………
a) current
b) voltage
c) resistance
d) motor
Resistance lovers the flow of ………
a) current
b) voltage
c) charge
d) motor
If the voltage does not change, as resistance increases, the current………
a) increases
b) decreases
c) varies irregularly
d) remains same
If material offers a small resistance, less……..would be required to push current through the circuit.
a) flow of current
b) voltage
c) resistance
d) motor
