Question on: JAMB Physics - 2022
A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?
A
2400 J
B
9600 J
C
1500 J
D
1200 J
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Correct Option: A
Here's how to solve this problem:
1. **Identify the knowns:**
* Current (I) = 0.5 A
* Voltage (V) = 40 V
* Time (t) = 2 minutes = 120 seconds
2. **Calculate the power (P):**
* Power is calculated using the formula: P = V * I
* P = 40 V * 0.5 A = 20 W
3. **Calculate the energy (E):**
* Energy is calculated using the formula: E = P * t
* E = 20 W * 120 s = 2400 J
Therefore, the
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