Question

Suppose a 6-volt battery is connected across a lamp, whose resistance is 20 ohm, through a
variable resistor as shown in fig. If the current in the circuit is 0.25 1. Four resistances or
equal value 1 ohm are given. Show by diagrams all different variations in which these
four resistances can be connected. Calculate in each case the resultant resistance of the
combination. In which case is the total resistance highest and in which it is lowest
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Answer 1

Answer:

In series combination

1+1+1+1=4

In parallel combination

1/1+1/1+1/1+1/1=1/4

Explanation:

In a series combination the resistance is very high while the parallel combination of a resistor the resistance of very low