A hair dryer uses 3.0 amps and 120 volts. What is the resistance?
i need help ^^^
E = IR
120 = 3R
R = 40Ω
Better study that unit again ...
R = E/I = 120/3 = 40 ohms.
To find the resistance of the hair dryer, you can use Ohm's law which states that resistance (R) is equal to voltage (V) divided by current (I).
In this case, the voltage (V) is 120 volts and the current (I) is 3.0 amps.
Therefore, the resistance (R) can be calculated as:
R = V/I
R = 120 volts / 3.0 amps
R = 40 ohms
So, the resistance of the hair dryer is 40 ohms.
To find the resistance of the hair dryer, you can use Ohm's Law, which states that resistance (R) is equal to voltage (V) divided by current (I).
The formula is:
R = V / I
In this case, the voltage (V) is 120 volts and the current (I) is 3.0 amps. Plugging these values into the formula, we get:
R = 120 volts / 3.0 amps
Now we can calculate the resistance:
R = 40 ohms
So, the resistance of the hair dryer is 40 ohms.