If the wire in the experiment to determine the resistivity of a material using metre bridge is replaced by copper or hollow wire the balance point i.e. null point shifts

to right

No worries! We‘ve got your back. Try BYJU‘S free classes today!

to left

No worries! We‘ve got your back. Try BYJU‘S free classes today!

at same point

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

None of these

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C at same point
The null point will remain at same point because null point depends on known resistance, $R$ and unknown resistance , $S$ only.
Null condition: $\frac{R}{S} = \frac{l}{100 - l}$ where $l =$ null point position in the wire.

Suggest Corrections

Similar questions

Q. A metre bridge is balanced with known resistance in the right gap and a metal wire in the left gap. If the metal wire is heated the balance point

Q. An unknown resistance

X

is connected in a left gap and known resistance

R

is connected in the right gap of a metre bridge. The balance point is obtained at 60 cm from the left end of the wire. When R is increased by

2 Ω

, the balance point shifts by

10 c m

. Find

X

and

R

respectively.

Two equal resistances are connected in the gaps of a metre bridge. If the resistance in the left gap is increased by (10%) the balancing point shifts by

In a metre bridge experiment, two unknown resistances X and Y are connected to left and right gaps respectively and the balancing point is obtained at 20 cm from right. What will be the new position of the null point from left if one decides to balance a resistance of 4X against Y? (Assume that length of wire of metre bridge is 120 cm.)

Join BYJU'S Learning Program

If the wire in the experiment to determine the resistivity of a material using metre bridge is replaced by copper or hollow wire the balance point i.e. null point shifts

The correct option is C at same pointThe null point will remain at same point because null point depends on known resistance, R and unknown resistance , S only. Null condition: RS=l100−l where l= null point position in the wire.

The correct option is C at same point
The null point will remain at same point because null point depends on known resistance, $R$ and unknown resistance , $S$ only.
Null condition: $\frac{R}{S} = \frac{l}{100 - l}$ where $l =$ null point position in the wire.