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preciousk72
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Homework Statement
If a device uses 3 ampere and a 120 Volt, what is the resistance of the material?
Homework Equations
I think it's R=120/3
The formula for finding resistance is R = V/I, where R is resistance, V is voltage, and I is current.
To find resistance with a given voltage and current, divide the voltage by the current. For example, if voltage is 120V and current is 3A, the resistance would be 120V/3A = 40.
Resistance is important in electricity because it determines how much current will flow through a circuit. Higher resistance means less current, while lower resistance means more current. It also affects the amount of heat generated in a circuit.
The units for resistance are ohms (Ω). Ohms are represented by the Greek letter omega (Ω) and are named after the German physicist Georg Ohm.
No, resistance cannot be negative. It is a measure of how difficult it is for current to flow through a circuit, and therefore cannot have a negative value. It can only have positive values or be equal to zero.