Advertisements
Advertisements
प्रश्न
A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance if the wire is doubled itself.
Advertisements
उत्तर
Given: The resistance of 10 m long wire = 5 Ω
On doubling the wire on itself the length is reduced to half and the area of cross-section is doubled so the resistance is reduced to one-fourth i.e. the resistance of the wire will become:
`1/4 xx 5 Omega = 1.25 Omega`
संबंधित प्रश्न
Name a device that helps to maintain a potential difference across a conductor.
By what other name is the unit joule/coulomb called?
What do the letters p.d. stand for?
Which device is used to measure p.d?
The other name of potential difference is:
What p.d. is needed to send a current of 6 A through an electrical appliance having a resistance of 40 Ω?
State the S.I. unit of electric potential.
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.
What is the measure of the work done on the unit positive charge to bring it to that point against all electrical forces?
