All electric devices are required to have identifying plates that specify their electrical characteristics. The plate on a certain steam iron states that the iron carries a current of 6.00 A when connected to a source of 1.20 ✕ 102 V. What is the resistance of the steam iron?
a. 0.0500.
b. 20.0.
c. 36.0.

b. 20.0

Explanation:

From ohm's law,

V = IR Equation 1

Where V = Voltage source, I = current carried by the iron, R = Resistance of the steam iron.

Make R the subject of the equation

R = V/I Equation 2

Given: V = 1.2×10² V, I = 6.00 A.

Substitute into equation 2

R = 1.2×10²/6

R = 20 Ohms.

Hence the resistance of the steam iron = 20 Ohms.

The right option is b. 20.0

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explanation:

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west