Question

Two parallel resistances 4 ohms and 8 ohms are connected with a known resistance of 6 ohms as shown in figure where is the balance point on the wire of the metre bridge
with explanation​

Answer 1

Explanation:

Given : l=20 cm l

′

=40 cm

Using

R

2

R

1

=

100−l

l

∴

R

2

R

1

=

100−20

20

⟹R

2

=4R

1

Again using

R

2

′

R

1

′

=

100−l

′

l

′

where R

1

′

=R

1

+15 and R

2

′

=R

2

=4R

1

∴

4R

1

R

1

+15

=

100−40

40

⟹R

1

=9Ω

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Answer 2

2+3-85-=294@294-92859/5