Advertisements
Advertisements
प्रश्न
An electric bulb draws 0.5 A current at 3.0 V. Calculate the resistance of the filament of the bulb.
Advertisements
उत्तर
I = 0.5 A, V = 3.0 V
Resistance of filament of the bulb R = `"V"/"I" = 3.0/0.5 = 6 Omega`
संबंधित प्रश्न
Name a device that helps to maintain a potential difference across a conductor.
Name a device which helps to maintain potential difference across a conductor (say, a bulb).
What p.d. is needed to send a current of 6 A through an electrical appliance having a resistance of 40 Ω?
In the circuit diagram given below, the current flowing across 5 ohm resistor is 1 amp. Find the current flowing through the other two resistors.

Write an expression for the electrical power spent in flow of current through a conductor in terms of resistance and potential difference.
What do you understand by the resistance of a wire?
State Ohm’s law.
A current of 1 ampere flows in a series circuit containing an electric lamp and a conductor of 5 Ω when connected to a 10 V battery. Calculate the resistance of the electric lamp.
Now if a resistance of 10 Ω is connected in parallel with this series combination, what change (if any) in current flowing through 5 Ω conductor and potential difference across the lamp will take place? Give reason.
How will you conclude that the same potential difference (voltage) exists across three resistors connected in a parallel arrangement to a battery?
Electric potential is a measure of the ______ on the unit positive charge to bring it to that point against all electrical forces.
