State and Define the S.I. Unit of Resistance.

State and define the S.I. unit of resistance.

Short/Brief Note

The S.I. unit of resistance is 'ohm' (volt per ampere).

The resistance of a conductor is said to be 1 ohm if a current of 1 ampere flows through it when the potential difference across it is 1 volt.

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Types of Circuits: Simple Circuit

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Chapter 9: Current Electricity - Exercise 9 (B) [Page 198]

Chapter 9 Current Electricity
Exercise 9 (B) | Q 9 | Page 198

In transferring 1.5 C charge through a wire, 9 J of work is needed. Find the potential difference across the wire.

How electric current flows in solids?

Select the correct option:

In a metallic conductor, electric current is thought to be due to movement of:

What do you understand by the term series circuit?

battery

Label the different parts A, B, C, D, E, and F. State the functions of each part. Show in the diagram the direction of flow of current.

State three factors on which the resistance of a wire depends. Explain, how does the resistance depend on the factors stated by you.