Is it correct to say that electrical appliances with high power must also have high power?

Is it correct to say that electrical appliances with high power must also have high power?

Of course not
Should be in a certain normal working hours, the power of electrical appliances, electrical power must also be large
Electric power = electric power * working time
If the electric power is large and the working time is small, the electric power is not necessarily large

How many watts of electrical power is the electrical appliance with 50 Ω resistance connected to 10V power supply
When an electrical appliance is connected to a 10V power supply and the current passing through it is 0.2A, how many watts is the electrical power of the electrical appliance

Power P = u * I = u ^ 2 / r = 100 / 50 = 2W

If an electrical appliance is connected to a power source alone, the power consumed is p; if the electrical appliance and a certain resistance are connected to the power source in series, the power consumed by the electrical appliance is p
If an electrical appliance is connected to a power supply alone, the power consumed is p; if the electrical appliance and a certain value resistor are connected to the power supply in series, the power consumed by the electrical appliance is p /. At this time, the power consumed by the constant value resistor P1 =____________ .

Let the power supply voltage be u and the resistance of the consumer be r. when the consumer is directly connected to the power supply, P = u ^ 2 / R leads to u ^ 2 = P * r. equation 1 when the consumer is connected to the constant resistance R0 in series, it receives the same power