CBSE Class 10 Science 2019 · Paper 31/4/1 · Question 1

Electricity 1 mark Easy

Define resistance. Give its S.I. unit.

Answer

Resistance is the opposition a conductor offers to current, $R = \frac{V}{I}$ ; its S.I. unit is the ohm ( $Ω$ ).

Resistance is the property of a conductor to resist (oppose) the flow of charges, that is, the electric current, through it; it is measured as

R = \frac{V}{I}

. Its S.I. unit is the ohm (

Ω

), where

1 Ω = 1 V /1 A

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