Question

please answer question number 28,29 and 30 . no spamming correct answer will be marked brainlist and receive 50 points.

Answer 1

Ans 29 Nichrome is used for making filament of bulbs because melting point of nichrome is very high approximately 3695 degree C. It have lowest vapour pressure. It have greatest tensile out of all metals .Therefore,due to these properties nichrome is used.


Hope this answer will help you my friend!!!!

Answer 2

$<b>$Hey Mate..

The equivalent resistance when three resistance are connected in parallel.

Let I1, I2, I3- current in

R1,R2,R3_ in resistance.

The main current is _ I= I1+ I2+I3

BY OHM'S LAW :

I1=V/R1. ..... 1.)

I2= V/R2....2.)

I3= V/R3....3.)

SO, THE ADD all this.

so we use.

I=I1+ I2+I3

so...

the answer is..

1/Rp = 1/R1+ 1/R2 + 1/R3

I HOPE THE ANSWER YOU GET.

THANKS.