JAMB - Physics (1987 - No. 38)
A galvanometer of resistance 20\(\Omega\) is to be provided with a shunt that \(\frac{1}{10}\) of the whole current in a circuit passes through the galvanometer. The resistance of the shunt is
2.00\(\Omega\)
2.22\(\Omega\)
18.00\(\Omega\)
18.22\(\Omega\)
Vysvětlení
\(\frac{1}{10}\)I x 20 = \(\frac{9}{10}\)I x Rs
Rs = 2.22\(\Omega\)
Rs = 2.22\(\Omega\)