Page 31 - CHAPTER-1 (Electricity)

CHAPTER 1

ELECTRICITY

In series combination, the current flowing through each component

of the circuit is same and is equal to the total current flowing in the

circuit. So, 0.5A current will flow through the ammeter, so its reading

will be 0.5A.

(i) Reading of voltmeter = Potential difference across 2Ω bulb

∴V=IR=0.5×2=1V

[∵ current flowing through the bulb is 0.5A]

Mental floss!

Decoration of lighting in festivals is an example of series

grouping whereas all household appliances connected is a

parallel grouping.

Disadvantages of Series Combination

• In this combination, if any of the components fail to work, then the

circuit will break and none of the components will work.

• It is not possible to effectively use a bulb and a heater in series

because they need a different amount of currents.

(ii)Resistors in Parallel

When two or more resistors are connected at the same time between

two points to each other then they are said to be connected in parallel

combination. The following figure shows the connection of resistors in

parallel.

An applied potential V produces current I in R , I in R and I in R .
2
3
3
2
1
1

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