Question

Q1.Anita’s father had constructed a new room in their house. An electrician was called in to do the electric wiring. The electrician was asked to do wiring for two fans, two bulbs, a light socket and a power socket. Anita studies in tenth standard. Just when the electrician had completed the wiring, Anita returned home from school. Anita wanted to check the wiring by using all the switches and sockets. Anita found that the two fans and two sockets worked properly, each having a separate switch but there was a problem in the working of bulbs. Both the bulbs could be switched on and switched off with the same switch. Anita explained the mistake in wiring to electrician and then two separate switches were provided for the two bulbs. Read the above passage and answer the following questions: (a) In what way were the two fans and two sockets connected in the household circuit by electrician? (1) (b) What mistake made by the electrician in connecting two bulbs in the circuit? (1

Answer 1

${\underline{\sf{Solution}}}$

Before going to the answer let's ,know about Series and Parallel Combination.

${\underline{\sf{Resistance\:in\:Series}}}$

• Two or more resistors are said to be connected in series, if the same current passes through all the resistors.

Series circuit :

1. In series circuit ,if one electrical appliance stop working due to some effect, then all other appliances also stop working.
2. In series circuit all the electrical appliances have only one switch due to which they cannot be turn on or off separately.
3. In the series connection of electrical appliances , the overall resistance of the circuit increases too much due to the which the current of the power supplies is to low
4. In series circuit , the applicances do not get the same voltage as a power supply line.

${\underline{\sf{Resistance\:in\: Parallel}}}$

• Two or more resistors are said to be connected in parallel , if the same potential difference exists across all the resistors.

Parallel circuit :

1. In parallel circuit ,if one electrical appliance stop working due to some effect, then all other appliances keep working normally .
2. In parallel Circuits, each electrical appliances has its own switch to which it can be turned on or turned off independently.
3. In parallel circuits , each electrical appliances get the same voltage as that of power supply line.

${\underline{\sf{Answer\:Of\:The\:Given\:Passage}}}$

1. the two fans and two sockets connected in parallel connection in the household circuit by electricians .
2. The two electric bulbs were connected wrongly in series in the circuit. Due to which bulbs glow less brightly because they would not get the same voltage of 220 volts of the mains supply line.

Answer 2

Answer:

{\underline{\sf{Solution}}}

Solution

Before going to the answer let's ,know about Series and Parallel Combination.

{\underline{\sf{Resistance\:in\:Series}}}

ResistanceinSeries

• Two or more resistors are said to be connected in series, if the same current passes through all the resistors.

Series circuit :

In series circuit ,if one electrical appliance stop working due to some effect, then all other appliances also stop working.

In series circuit all the electrical appliances have only one switch due to which they cannot be turn on or off separately.

In the series connection of electrical appliances , the overall resistance of the circuit increases too much due to the which the current of the power supplies is to low

In series circuit , the applicances do not get the same voltage as a power supply line.

{\underline{\sf{Resistance\:in\: Parallel}}}

ResistanceinParallel

• Two or more resistors are said to be connected in parallel , if the same potential difference exists across all the resistors.

Parallel circuit :

In parallel circuit ,if one electrical appliance stop working due to some effect, then all other appliances keep working normally .

In parallel Circuits, each electrical appliances has its own switch to which it can be turned on or turned off independently.

In parallel circuits , each electrical appliances get the same voltage as that of power supply line.

{\underline{\sf{Answer\:Of\:The\:Given\:Passage}}}

AnswerOfTheGivenPassage

the two fans and two sockets connected in parallel connection in the household circuit by electricians .

The two electric bulbs were connected wrongly in series in the circuit. Due to which bulbs glow less brightly because they would not get the same voltage of 220 volts of the mains supply line.