Q3. The equivalent resistance of 3 10 ohm resistors in series is= 10 +10+10=30 ohm
this 30 ohm is in parallel with 20 ohm resistor
Again the equivalent resistance = (30 x 20)/(30 +20) = 12 ohm
this 12 ohm is in series with 5 ohm.. so the equivalent resistance = 12 + 5= 17 ohm
the current in the circuit =11/17 A
potential drop across 5 ohm resistor = current x 5 = (11/17) x 5 = 3.24 V
so potential drop across 20 ohm resistor = 11 - 3.24 = 7.76 V ( as they are in series)
all the best in the course work
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