Question

Calculate Net Resistance
e between
point A & B

​

Answer 1

Answer:

$\frac{120}{533}R$

Explanation:

1. The resistances below the hips of the man will be 6R.
2. At his head, The hairs and and forehead give R resistance.
3. The resistances which are drawn as fingers of the man don't play any role, because there's a short circuit above them.
4. All resistances above his chest come out to be 9R.
5. The two resistances resembling nipples give equivalent of 2R, which in turn is parallel to 9R resistance calculated in above point.
6. Hence, equivalent resistance above the abdomen become 18/11 R
7. This 18/11 R is in series with the two resistances each at left and right lumbar regions. So their equivalent resistance becomes 40/11 R.
8. Now, the 8 resistances resembling abdominal muscles will be equivalent to R/4 + R/4 = R/2
9. Now, we get four resistances between A and B, all being parallel to each other viz.

• 40/11 R (calculated in point 7)
• R/2 (calculated in point 8)
• R/2 (as given in diagram, between A and B)
• 6R (calculated in point 1)

Hence, these four will give equivalent resistance $\frac{120}{533}R$

Answer 2

Answer:

120/533R

Explanation:

The resistances below the hips of the man will be 6R.

At his head, The hairs and and forehead give R resistance.

The resistances which are drawn as fingers of the man don't play any role, because there's a short circuit above them.

All resistances above his chest come out to be 9R.

The two resistances resembling nipples give equivalent of 2R, which in turn is parallel to 9R resistance calculated in above point.

Hence, equivalent resistance above the abdomen become 18/11 R

This 18/11 R is in series with the two resistances each at left and right lumbar regions. So their equivalent resistance becomes 40/11 R.

Now, the 8 resistances resembling abdominal muscles will be equivalent to R/4 + R/4 = R/2

Now, we get four resistances between A and B, all being parallel to each other viz.

40/11 R (calculated in point 7)

R/2 (calculated in point 8)

R/2 (as given in diagram, between A and B)

6R (calculated in point 1)

Hence, these four will give equivalent resistance \frac{120}{533}R

533

120

R