You visited us 1 times! Enjoying our articles? Unlock Full Access!

Potentiometer

In the follow...

Question

In the following circuit the resistance of wire AB is $10 Ω$ and its length is 1m. Rest of the quantities are given in the diagram. The potential gradient on the wire will be

0.08 \frac{V}{m}

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

0.008 \frac{V}{m}

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

0.8 \frac{V}{m}

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

n o n e

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

Open in App

Solution

The correct option is B $0.8 \frac{V}{m}$
Potential gradient depends only on the primary circuit $\Rightarrow$

voltage drop per unit length of the wire $(v)$

current in primary circuit = $\frac{2}{15 + 10} = \frac{2}{25} A$

voltage drop per unit length of the wire AB $\Rightarrow v = \frac{I R}{L} = \frac{\frac{2}{25} \times 10}{1}$

$v = \frac{20}{25} = 0.8 \frac{V}{m}$

Suggest Corrections

Similar questions

A potentiometer wire has length 10 m and resistance $10 Ω$ . It is connected to a battery of EMF 11 volt and internal resistance $1 Ω$ , then the potential gradient in the wire is

Q. In the following diagram, the lengths of wires

A B

and

B C

are equal, but the radius of wire

A B

is double that of

B C

. The ratio of potential gradient on wires

A B

and on

B C

will be (wires are made of the same material).

Q. length of potentiometer wire is

4 m

. its resistance is

2 Ω

and the current passing through its potential gradient on a wire is

Q. In the following circuit diagram fig. the lengths of the wires AB and BC are same but the radius of AB is three times that of BC. The ratio of potential gradients at AB and BC will be

Q. The potentiometer wire

10 m

long and

20 o h m

resistance is connected to a

3 v o l t

emf battery and a

10 o h m

resistance. The value of potential gradient in

v o l t / m

of the wire will be

Join BYJU'S Learning Program

In the following circuit the resistance of wire AB is 10Ω and its length is 1m. Rest of the quantities are given in the diagram. The potential gradient on the wire will be

The correct option is B 0.8VmPotential gradient depends only on the primary circuit ⇒ voltage drop per unit length of the wire(v)current in primary circuit = 215+10=225Avoltage drop per unit length of the wire AB⇒v=IRL=225×101v=2025=0.8Vm

In the following circuit the resistance of wire AB is $10 Ω$ and its length is 1m. Rest of the quantities are given in the diagram. The potential gradient on the wire will be