Consider the circuit shown in figure. Find the current through the 10Ω resistor when the switch S is A. open B. closed.
0.1A and 0.3 A
Given, resistor , 
and 
.
A If the switch is open, both resistors are in series.
Total resistance, 
Current, 
B If the switch is closed, 
is short circuited.
Total resistance, 
Current, 
1