The energy expended by a 3V cell in moving 12 coulombs of charge across its terminals in 10s is

Explanation:

Solution for Correct Option:

The energy expended by a 3V cell in moving 12 coulombs of charge across its terminals in 10 seconds is calculated using the formula for electrical energy:

Electrical Energy (E) = Voltage (V) × Charge (Q)

Here, the given values are:

• Voltage (V) = 3 volts
• Charge (Q) = 12 coulombs

Step-by-Step Calculation:

Substitute the values into the formula:

E = 3 × 12

E = 36 joules

Thus, the energy expended by the cell is 36 joules.

Key Points:

• The time duration (10 seconds) is not relevant to the calculation of energy in this context because the formula for energy does not depend on time; it only depends on voltage and charge.
• The correct answer is Option 2: 36 J.