Calculate the current flowing through a heater rated at `2 kW` when connected to a `300V` d.c. supply.

Explanation

To calculate the current flowing through a heater rated at 2 kW when connected to a 300V d.c. supply, we can follow these steps:

### Step 1: Understand the relationship between power, voltage, and current
The power (P) consumed by an electrical device can be calculated using the formula:
\[ P = V \times I \]
where:
- \( P \) is the power in watts (W)
- \( V \) is the voltage in volts (V)
- \( I \) is the current in amperes (A)

### Step 2: Convert the power rating from kilowatts to watts
The heater is rated at 2 kW. To convert this to watts:
\[ 2 \text{ kW} = 2 \times 10^3 \text{ W} = 2000 \text{ W} \]

### Step 3: Rearrange the formula to solve for current
We need to find the current (I), so we can rearrange the formula:
\[ I = \frac{P}{V} \]

### Step 4: Substitute the known values into the formula
We know:
- \( P = 2000 \text{ W} \)
- \( V = 300 \text{ V} \)

Substituting these values into the formula gives:
\[ I = \frac{2000 \text{ W}}{300 \text{ V}} \]

### Step 5: Calculate the current
Now, perform the division:
\[ I = \frac{2000}{300} = \frac{20}{3} \approx 6.67 \text{ A} \]

### Conclusion
The current flowing through the heater is approximately:
\[ I \approx 6.67 \text{ A} \]

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