NCERT Solution for Class 10 Science Chapter 12
Electricity
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-209
Questions No-3
Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it?
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According to the Ohm’s law V = IR
If the resistance remains constant, V is directly proportional to I. Therefore, 𝑉∝𝐼
Now, if potential difference is reduced to half of its value, the current also become half of its original value.
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When potential difference is halved, the current through the component also decreases to half of its initial value. This is according to ohm’s law i.e., V ∝ I.
Since Resistance (R) = PotentialDifference(V)/Electriccurrent(I)
Therefore, if potential difference between two ends of the component will be halved, and resistance remains constant, then electric current would also be halved.