Question

In a household electric circuit, different appliances are connected in parallel to one another. Give two reasons
An electrician puts a fuse of rating 5A in that part of domestic electrical circuit in which an electrical heater of rating 1.5 kW, 220V is operating. What is likely to happen in this case and why? What change, if any, needs to be made?

Answer 1

Answer:

In a household different appliances are connected in parallel because:

-It provides equal voltage

-It allows appliances to be used individually instead of turning all the appliances on at once.

second part

The fuse is likely to melt and break the circuit since the heater consumes more than 5A

The fuse should be changed to a 7A fuse.

Explanation:

P=1.5kw=1500w

v=220v

P=vi

i=P/v

i=1500/220=6.8(approx)

i=6.8A

pls mark brainliest

Answer 2

Household appliances are connected in parallel.

Fuse needs to have a rating of 7A or higher.

Explanation:

In a household, electric circuit of different appliances are connected in parallel to one another due to the following reasons:

1. In parallel circuits, different appliances have the same potential difference, and the current is divided among them.
2. If one item stops working, it does not affect the other appliances as the working of each each appliance is independent. Switching off one appliance will not affect the working of other appliances.

Electrical fuse = 5 A

Power of heater = 1.5 kW = 1500 watts

Voltage = 220 V

The safe current drawn by the electrical heater is:  

I = P/V = 1500 / 220 = 6.8 A

The fuse will blow off if the current exceeds 5A. So the heater will not work as it requires 6.8 A.

The fuse should be changed to have a rating of 7A or higher.