Question

5. A battery of 12 V is connected to a series combination of resistors 3,4,5and 12 ohm.
How much current would flow through the 12 resistor?

Ans:

Answer 1

Answer:

The answer is 0.25 A

Explanation:

1.First calculate the R eq. of the combination.

2. Now, find the total current coming out of the battery using V=IR (where R is Req. and V is emf of battery)

3. From here, I total = 0.5 ampere

As u know in series combination, this current is divided in ratio of the resistances. So, now, we have to apply some basic maths here.

Total Current= 0.5A

Ratios of resistances= 3:4:5:12

So, Current flowing through a particular resistance

= That resistance/sum of ratios × Total current. ( This is basic maths to find the value of one ratio if other are in proportion)

So, current through 12 ohm resistor = 12/24 ×0.5A

=0.5×0.5

=0.25A.

HOPE IT HELPS