Q.2 a) why electrical appliances I household circuit are connected in
parallel instead of series? Give at least three reasons
b) state joules law of heating.
Answers
Answer:
Different electrical appliances in a domestic circuit are connected in parallel because of the following advantages:
(i) If one electrical appliance stops working due to some defect, then all other appliances keep working properly.
(ii) Each electrical appliance has its own switch due to which it can be turned on or turned off independently, without affecting other appliances.
(iii) Each electrical appliance gets the same voltage as that of the power supply line
Joule’s law is a mathematical expression of the rate at which resistance in a circuit turns electric energy into heat energy. The heat produced because of the current flow in an electric wire is represented in Joules.
The joule’s law of heat displays the connection between heat generated Via a conductor by flowing electric current.
Q = I²✕ R ✕ T
Where
Q = Amount of heat
I = Electric current
R = Amount of electric resistance in the conductor
T = Time
we know that
V = W/Q………………………..(1)
Where
V = Volt
W = Work done
Q = Total charge
Equation (1) we get
W = VQ…………………(2)
And Current (I) = Q/T…………………(3)
And Q = IT……………….(4)
Substitute equation (4) in equation (3) we get
W = VIT…………………(5)
Consider Ohm’s law
V = IR…………………(6)
Substitute equation (6) in equation (5) we get
W = IRIT
W = I²RT
☆ I HOPE ITS HELP YOU ☆
The digestion process in Ruminants begins by chewing and swallowing its food. Ruminants do not completely chew the food they eat, but just consume or gulp as much they can and then swallow the food.