1500-W heater is connected to a 120-V line for 2.0 hours.How much heat energy is produced? A) 1.5 kJ B) 11 MJ C) 0.18 MJ D) 3.0 kJ

## Answer

## General guidance

The relation between the power required by the heater and heat produced by the heater is given as follows:
Here, *Q* is the heat produced by the heater, *P* is the power consumed by the heater, and *t* is the time for which heater runs.

## Step-by-step

### Step 1 of 2

Calculate the time for which the heater works in seconds is given as follows: Therefore, the heater works for 7200 s.

The time is converted to seconds. So that, it compatible with units of power, which is Watt .

### Step 2 of 2

Calculate the heat energy produced by the heater as follows:
Substitute 1500 W for *P* and 7200 s for *t* in the above-mentioned equation.

Therefore, correct answer is option-B) 11 MJ.

**The correct answer is option-B) 11 MJ.**

The Heat produced by the heater is product of power used by the heater and time for which the heater runs.

### Answer

**The correct answer is option-B) 11 MJ.**

### Answer only

**The correct answer is option-B) 11 MJ.**