Question

In electrical calculations, electromotive force is expressed by the letter e, resistance by letter r, and current by the letter i (which comes from the word 'intensity'). According to Ohm's law: i = e/r. In other words, the ______ flowing through a ______, measured in ______, equals the ______ of electrical ______ measured in ______, divided by the total ______, measured in ______. To work out the value of r, it is necessary to calculate the total resistance of all the ______ and connecting lengths of ______ that make up the circuit. Once both the voltage and amperage are known, it is possible to work out the power, measured in ______, that will be consumed. Power (p) can be calculated using the equation p = ei. Therefore, ______ equals voltage multiplied by amperage.

Answer 1

According to Ohm's law, voltage is calculated using the equation V = IR. To find resistance, you need to calculate the total resistance of the circuit. Power can be calculated using the equation p = ei, where power equals voltage multiplied by amperage.

Step-by-step explanation:

According to Ohm's law, the voltage drop, V, across a resistor when a current flows through it is calculated using the equation V = IR, where I equals the current in amps (A) and R is the resistance in ohms (). Another way to think of this is that V is the voltage necessary to make a current I flow through a resistance R.

To work out the value of R, it is necessary to calculate the total resistance of all the resistors and connecting lengths of wires that make up the circuit. Once both the voltage and amperage are known, it is possible to work out the power, measured in watts, that will be consumed. Power (p) can be calculated using the equation p = ei. Therefore, power equals voltage multiplied by amperage.