Home
Class 12
PHYSICS
The resistance of an incandescent lamp i...

The resistance of an incandescent lamp is

A

greater when switched off

B

smaller when switched on

C

greater when switched on

D

the same whether it is switched off or switched on

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

The resistance of an incadescent lamp is

How much energy in radiated per minute from the filament of an incandescent lamp at 3000 K, if the surface area is 10^(-4)m^(2) and its emissivity is 0.4 ? Stefan's constant sigma = 5.67 xx 10^(-8) Wm^(-2)K^(-4) .

Calculate the energy radiated per second from the filament of an incandescent lamp at 2000K, if the surface area is 5.0 xx 10^(-5) m^(-2) and its relative emittance is 0.85 & sigma = 5.7 xx 10^(-8) W m^(-2) K^(-4)

The resistance of the filament of a lamp increases with the increase in temperature. A lamp rated 100 W and 220 V is connected across 220 V power supply. If the voltage drops by 10% , then the power of the lamp will be

A battery of four cells in series each having an efm of 1.5 V and internal resistance 1Omega are connected in series with an ammeter, a coil of resistance 2Omega and a filament lamp. If the ammeter reads 0.5 A, the resistance of the filament lamp is

Why are filaments of incandescent lamps made of thin tungsten wire ?

The resistance of hot tungsten filament is about 10 times the cold resistance. What will be the resistance of 100 W and 200 V lamp when not in use?

What is the resistance of an electric arc lamb when hot, if the lamp uses 20 A when connected to a 200 volt line ?