Final answer:
The current taken by a 920 W appliance with a supply voltage of 230 V is 4 amperes (A). This is calculated using the power formula I = P/V, where P is the power in watts and V is the voltage in volts.
Step-by-step explanation:
The question involves the concept of electric power and current, which is a part of Physics. Given that an appliance has a power rating of 920 W (watts) and the supply voltage is 230 V (volts), the current it draws can be calculated using the formula:
P = IV
Where P is power in watts, I is current in amperes, and V is voltage in volts.
To find the current I, we rearrange the formula:
I = P/V
Substituting the given values:
I = 920 W / 230 V
I = 4 A
Therefore, the current taken by the 920 W appliance when supplied with 230 V is 4 amperes (A).
It is important to note that safety regulations often limit continuous use to a percentage of the breaker current capacity to prevent overheating and possible fires. In reality, continuous power usage is usually limited to 80%, which sets practical limits for high-power devices like heating appliances to avoid tripping circuit breakers or blowing fuses.