Question

According to Ohm's law; What is the relationship between R, V and I?
(class 10 CBSE SAMPLE PAPER 2017-18 SCIENCE)

Answer 1

Georg Simon Ohm, a German physicist in 1826 established Ohm's law.
Ohm's law
At constant temperature the Electric current(I) flowing through a conductor is directly proportional to the potential difference (V) across its ends.
I∝V (at constant temperature)
V∝I
V/I = constant R
R is the constant call resistance of the conductor.
V/I = R
V= I × R
I = V/ R

From the above relation:
1.The current is directly proportional to the potential difference.
a)If the potential difference across the ends of a conductor is doubled the current flowing through it also gets doubled.
b) if the potential difference across the ends of the conductor is halved the current flowing through it also gets halved.
2. The current is inversely proportional to the resistance.
a)If the resistance is doubled the current gets halved.
b) if the resistance is halved the current gets doubled.

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