Current Equation Physics

Calculate the quantity of charge which has passed through a cross section of the wire during the time t 2 sec to t 6 sec.

Current equation physics. An ammeter is a device used to measure the current at a given location. The centimetre gram second units of current is the electrostatic unit of charge esu per second. 832 electric charge is carried by charged particles so an electric current is a flow of charged particles the moving particles are called charge carriers which may be one of several types of. The ohm s law equation is often explored in physics labs using a resistor a battery pack an ammeter and a voltmeter.

This is a list of the equations which you might need to use for your gcse physics exam. One ampere equals 3 10 9 esu per second. A 60 watt lightbulb pulls. At the bottom of the page there are links to equations which the different examination boards have used in the past.

When a charge of 8 coulombs flows past any point along a circuit in 2 seconds the current is 4 a. The size of an electric current shows the rate of flow of electric charge. I q t a. A current of one ampere is a flow of charge at the rate of 1 coulomb per second.

An electric current is the rate of flow of electric charge past a point. Despite referring to many different things the word current is often used by itself instead of the longer more formal electric current. It is one of the important discoveries that helped us to revolutionize our way of living. Commercial power lines make available about 100 amps to a typical home.

The adjective electric is implied by the context of the situation being described. This equation called ohm s law shows the. These links will take you to a page which you can print if you want to so that you can revise these equations. To answer all these questions use the mathematical equation for current.

Today at the flick of a switch or turn of a knob we are having instant power. The resistance of an electrical component can be found by measuring the electric current flowing through it and the potential difference across it. This is possible due to the electric current. A voltmeter is a device equipped with probes that can be touched to two locations on a circuit to determine the electric potential difference across those locations.

You can calculate the size of a current using this equation. Physics formulas electric current formula. Electric current is defined as the rate at which charge flows through a surface the cross section of a wire for example. The current in a wire varies with time according to the equation i 4 2t where i is in ampere and t is in sec.