Define resistance using ohm\'s law. What is the unit of resistance? What is the

Question

Define resistance using ohm's law. What is the unit of resistance? What is the unit of Voltage? What is the unit of current? How much current is flowing through a circuit that has a total resistance of 12 ohms, and is connected in series with a power source of 24 volts? What is the voltage across a resistor of 60 ohms that is carrying a current of 100 mA. Three resistors of 20, 40, and 80 ohms are connected in parallel. What is the equivalent resistance of the combination of resistors? How many KWH will be consumed by a light bulb of 100 watts if it stays lit for 50 hours?

Explanation / Answer

(1)
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
So, V = I*R
where I is the current through the conductor in units of amperes, V is the voltage measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms. Ohm's law states that the R in this relation is constant, independent of the current.

(2)
Unit of Resistance, = Ohms ()

(3)
Unit of Voltage = Volt (V)

(4)
Unit of Current = Ampere (I)

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