Question

if the balance point is obtained at 35 cm in a metre bridge the resistance in the left and right gaps are in the ratio of​

Answer 1

Answer:

Balance point is obtained at 35 cm in a meter bridge .

Metre Bridge is a device which works on the principle of Balanced Wheatstone Bridge. It helps us to calculate the resistance of an unknown resistor in presence of a known shunt resistance.

It consists of the following parts :

Unknown Resistance

Shunt Resistance

1 metre or 100 cm long wire

Since balance point is obtained at 35 cm , we can consider Balanced Wheatstone Bridge condition such that the adjacent resistances will be in ratio.

Let the resistances be P and Q and l be the balance point :

Q

P

=

100−l

l

Q

P

=

100−35

35

Q

P

=

65

35

⇒

13

7

So the resistances will be in the ratio of : 7:13