Brilliant What Is Power Output In Physics

A 60-W light bulb for example expends 60 J of energy per second.

What is power output in physics. Power is the rate at which energy is moved and so electric power is P P E t qV t P P E t q V t. F - Fr- mg sin20 0. Electrical power is calculated by multiplying voltage in volts by current in amps.

The power output of electrical equipment such as light bulbs or stereos is typically advertised in watts. Power output of a heat engine. Recognizing that current is I q t note that Δ t t here the expression for power becomes.

Also what is power abbreviated as. By definition one watt is equal to one joule of work done per second. This can be shown in the.

The SI unit for power is the watt W where 1 watt equals 1 joulesecond 1 W 1 Js. Because work is energy transfer power is also the rate at which energy is expended. The motor is connected to a 120 V source and is 820 efficient in converting power that it takes in by electrical transmission into mechanical power.

The unit is named after the Scottish inventor and industrialist James Watt. Because work is energy transfer power is also the rate at which energy is expended. Power is the rate at which work is done.

If you have force distance and time you can use the substituted formula you see here. Physics QA Library The mechanical power output of an electric motor is 270 hp. If a transformer is 100 efficient then the input power will equal the output power.