Question

Match the physical quantities given in Column A with the units given in Column B and choose the correct option:
\[\begin{array}{|c|c|} \hline Column A & Column B \\ \hline \text{(1) Electrical resistivity} & \text{(i) Coulomb} \\ \hline \text{(2) Electric potential difference} & \text{(ii) Watt-hour} \\ \hline \text{(3) Electrical energy} & \text{(iii) Joule per coulomb} \\ \hline \text{(4) Electric charge} & \text{(iv) Ohm-meter} \\ \hline \end{array}\]

• A. 1-iv, 2-iii, 3-ii, 4-i
• B. 1-ii, 2-i, 3-iii, 4-iv
• C. 1-iv, 2-i, 3-ii, 4-iii
• D. 1-iv, 2-iii, 3-iii, 4-i

Hint:

Electrical resistivity has units of ohm-meter, electric potential difference is measured in joules per coulomb, electrical energy in watt-hour, and electric charge in coulombs.

Answer 1

The Correct Option is C

Step 1: Understanding the Physical Quantities and Units
- Electrical resistivity refers to the property of a material to resist the flow of electric current. Its unit is ohm-meter (iv).
- Electric potential difference is the energy per unit charge, also known as voltage. Its unit is joule per coulomb (iii).
- Electrical energy is the energy consumed by an electric current. Its unit is watt-hour (ii).
- Electric charge is the property of matter that causes it to experience a force when placed in an electric and magnetic field. Its unit is coulomb (i).

Step 2: Matching the Units to the Quantities
- Electrical resistivity: ohm-meter (iv).
- Electric potential difference: joule per coulomb (iii).
- Electrical energy: watt-hour (ii).
- Electric charge: coulomb (i).
Thus, the correct matching is: (C) 1-iv, 2-i, 3-ii, 4-iii.