How To Use Ohm S Law

Ohms law is a very common equation used in the field of electronics.

How to use ohm s law. In national 5 physics calculate the resistance for combinations of resistors in series and parallel. Just enter 2 known values and the calculator will solve for the others. Ohms law pie. 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.

If for example a test instrument detects a higher than normal current measurement it could mean that resistance has decreased or that voltage has increased causing a high voltage situation. Ohm s law parallel circuit. Knowing any two of the values of a circuit one can determine calculate the third using ohm s law. Determine what is required.

How to use it. Write the final answer. Use of ohm s law in parallel circuits. If the value of voltage is asked and the values of the current and resistance are given then to calculate voltage simply cover v at the top.

The ohm s law equation is often explored in physics labs using a resistor a battery pack an ammeter and a voltmeter. Use ohms law to relate resistance current and voltage. If the circuit has a current of 2 amperes and a resistance of 1 ohm these are the two knowns then according to ohms law and the formulas above voltage equals current multiplied by resistance. Simple to use ohm s law calculator.

Ohm s law magic triangle. To help us understand the the relationship between the various values a little further we can take all of the ohm s law equations from above for finding voltage current resistance and of course power and condense them into a simple ohms law pie chart for use in ac and dc circuits and calculations as shown. An ammeter is a device used to measure the current at a given location. Find the equivalent resistance in circuit.

For example to find the voltage in a circuit. If the remaining letters are over each other it means divide the top one with the bottom one. Join sign in. Calculate power current voltage or resistance.

If they are next to each other it means multiply one with the other. Ohm s law parallel circuit. Hi i m here to tell you how to use ohms law to figure out the resistance voltage or current of a circuit. You can make use of the ohm s law magic triangle to remember the different equations for ohm s law used to solve for different variables v i r.

Ohms law pie chart. Use your hand to cover the letter you want to find.