A motor operating on `120 V` draws a current of `2 A` . If the heat is developed in the motor at the rate of `9 cal s^(-1)`, what is the efficiency?

Explanation

To find the efficiency of the motor, we will follow these steps:

### Step 1: Calculate Input Power
The input power (P_input) of the motor can be calculated using the formula:
\[ P_{\text{input}} = V \times I \]
Where:
- \( V = 120 \, \text{V} \) (voltage)
- \( I = 2 \, \text{A} \) (current)
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