Question

Can you guys help me with this que???​

Answer 1

i.

R = 5

ii.

I = V/R

= 3.3/5

= 0.66 A

iii.

R = 1 / (1/2+3 + 1/5)

= 1 / (2/5)

= 5/2

= 2.5 Ohm

iv.

I = 3.3/2.5

= 1.31 A

Ask for doubts in comments section.

Answer 2

1. when key is open resistance is 5 ohm

2.

I =3.3/(5+0.5)=3.3/5.5

=3/5 A

3.

resistance when key closed 1/R=1/5 +1/(2+3)

=1/5+1/5=2/5

so R=5/2=2.5 ohm

4.

current = 3.3/(2.5+0.5)

=3.3/3=1.1 A