alleryStart learning →Ohm's law states that at constant temperature the current through a conductor is
Adirectly proportional to the voltage across it
Binversely proportional to the voltage
Cindependent of the voltage
Dproportional to the square of the voltage
Answer & Solution
Correct answer: A. directly proportional to the voltage across it
1. Ohm found V ∝ I at constant temperature, so V = IR.
2. Rearranged, I = V/R, i.e. current is **directly proportional to the applied voltage**.
3. The V–I graph is a straight line through the origin.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch12 'Electricity', §12.3 (Ohm's law)_
Keep practising Electricity
Browse all Electricity questions for Karnataka SSLC (Class 10), or explore more Science topics.
Related questions
If the resistance of a component is kept constant and the voltage across it is doubled, thThe commercial unit of electrical energy, '1 unit', isA potential difference of 12 V is applied across a $4\ \Omega$ resistor. The current throuJoule's law of heating states that the heat produced in a resistor isThe electric power dissipated in a resistor can be written asTwo resistors, each of resistance $R$, are connected in parallel. Their equivalent resistaFor resistors in parallel, the reciprocal of the equivalent resistance equalsWhen three resistors are connected in series, the equivalent resistance is