WAEC - Physics (2019 - No. 32)
A device consumes 100 W of power when connected to a 120 V source. Calculate its resistance.
1.2\(\Omega\)
12,000 \(\Omega\)
20.0\(\Omega\)
144\(\Omega\)
คำอธิบาย
P = \(\frac{V^2}{R}\)
R = \(\frac{120^2}{100}\)
= 144.0\(\Omega\)