At the bottom of the page there are links to equations which the different examination boards have used in the past. Power is measured in watts W energy in joules J and time in seconds s.
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GCSE Physics Monday January 4 2016.
Power formula physics gcse. Potential difference 𝐼 power current2. In this case W work done and is also measured in Joules J. E V x I x t energy voltage x current x time.
Also the 1kW was also converted into 1000W. Other equations that you should know include. Since the voltage across an electric device depends upon the current and resistance of that device the formula for electric power may also be written in terms of current and resistance.
Power frac work done time taken P frac E t This is when. 1 W 1 Js. P when some work W is done in a time t.
The amount of energy transferred by a component each second is called the power. The equation used to calculate power is. The equation for power is.
T power energy. P V x I. Energy is measured in joules.
Since 1 volt 1 joule per coulomb and 1 amp 1 coulomb per second. Power is an amount of energy supplied in a certain time. Power P is measured in watts W work done E is measured in.
Forces Electricity Energy Waves Light. Power voltage x current. P V x I power voltage x current.
Work done Energy transferred. Then watts volts x amps or power voltage x current. Work done Force x Distance.
BftexttextbfPowerfractexttextbfwork donetexttextbftime PfracWt Efficiency from energy transferred. E V x Q energy voltage x charge. For example what is the kinetic energy of a 1000 kg car.
Power from work done. 1 watt is 1 joule per second Electrical power can be calculated using the equation. Time energy transferred charge flow.
W F x d. These links will take you to a page which you can print if you want to so that you can revise these equations. Print out the Physics Formulas pdf GCSE Physics Equations Song.
P E. Text power. Scroll down the page for more examples and songs.
Power Energy. V I x R voltage current x resistance. Notice how the minutes was changed into seconds.
Click on the link for more information. Power is the rate of energy transfer. The unit of the power from the equation is given above joules however we generally use the unit of power.
Using the Power Equation. The following tables give the formulas that useful for GCSEIGCSE Physics. Your GCSE Physics Exam.
Power energy transferred time taken. This is sometimes written as. Power energy and time are related by the following equation.
As power is equal to useful energy transferred per second another way to calculate efficiency is to use the formula. Power is measured in watts. V I x R.
P E. V is the speed in metres per second ms. TexttextbfEfficiencyfractexttextbfuseful output energy transfertexttextbftotal input energy transfer Efficiency from power.
How much energy is transferred per second. KE is the kinetic energy in joules J. M is the mass in kilograms kg.
Power frac workdone time power frac W t This is when. It can be misunderstood by most of the students. P V x I.
Links Energy Transfer Calculations Revision Questions. Q I x t charge current x time. Power is the rate of work done in a unit of time.
The equation used to calculate the power is. 1 watt 1 joule per second. Means divided by so power energy.
P E. Formulae specification 8463. W V x Q work voltage x charge.
Efficiency frac usefulpowertransferred totalpowersupplied. Potential difference AQA GCSE Physics Equations. A series of free GCSEIGCSE Physics Formulas Notes and Lessons.
Power current. Resistance 𝐼2 energy transferred power. Power P is measured in watts W work done W is.
Power current 2. For all the physics equations we must make sure that we use seconds and not minutes or hours.
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