What is the p. d. across a 4 resistor when there is a current of 0.3 A in it?

1.2V

Explanation:

Given parameters:

Resistance  = 4Ω

Current  = 0.3A

Unknown:

Potential difference  = ?

Solution:

To find the potential difference, we use the ohms law;

              V = IR

Now, insert the parameters and solve;

       V = 0.3 x 4  = 1.2V

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.