When resistors are connected in series combination, then potential difference across each resistor will be:

Correct option is B

The correct answer is (B) Proportional to resistance.

Explanation:
In a series combination, the potential difference across each resistor is proportional to its resistance.

Incorrect Options Explanations:

• (A) Proportional to thickness: Incorrect, thickness doesn’t affect the voltage.
• (C) Similar: Incorrect, voltage varies with resistance.
• (D) Equally divided: Incorrect, voltage is not equally divided unless resistors are identical.

Information Booster:

• Series Circuit: Current remains the same through all resistors.
• Voltage Drop: The voltage across each resistor in series depends on its resistance, calculated using Ohm’s Law V=IRV = IR.
• Total Resistance: In series, the total resistance is the sum of individual resistances: Rtotal=R1+R2+…R_{total} = R_1 + R_2 + \dots.
• Ohm’s Law: V=IRV = IR helps calculate voltage drop across each resistor.