MyQuestionIcon

1

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

Conductor and Insulators

13. In the po...

Question

13. In the potentiometer circuit of figure, when the key K is inserted, balance length is found to be 20 cm for R = 5ohm and 30 cm for R = 10 ohm. The balance length if key is taken out, will be 1) 35 cm. 2) 45 cm. 3) 60 cm. 4) 50 cm

Open in App

Solution

Suggest Corrections

thumbs-up

3

Similar questions

Q. A potentiometer PQ is set up to compare two resistance as shown in the figure. The ammeter A in the circuit reads 1.0 A when two way key

K_{3}

is open. The balance point is at a length

l_{1}

cm from P when two way key

K_{3}

is plugged between 2 and 1, while the balance point is at a length

l_{2}

cm from P when key

K_{3}

is plugged between 3 and 1. The ratio of two resistances

\frac{R_{1}}{R_{2}}

, is found to be

Q. The internal resistance of a cell is to be determined using a potentiometer. In an experiment, an external resistance of

R

=

60 Ω

is used across the given cell. When the key

K_{1}

K_{2}

is open, the balance point is found at a length of

72

cm

. The balance length on the potentiometer is found at

60

cm

when both the keys are closed. Calculate the internal resistance of the cell.

Q. For the arrangement of the potentiometer shown in the figure, the balance point is obtained at a distance

75 cm

A

k

is open. The second balance point is obtained at

60 cm

A

k

is closed . Find the internal resistance of the battery

E_{1}

Ω)

Q. The balancing length for a cell is 560 cm in a potentiometer experiment. When an external resistance of 10 ohm is connected in parallel to the cell the balancing length changes by 60 cm. The internal resistance of the cell in ohms is

Q. For the arrangement of the potentiometer shown in the figure, the balance point is obtained at a distance 75 cm from A when the key k is open. The second balance point is obtained at 60 cm from A when thekey k is closed. Find the internal resistance (in

Ω

) of the battery

E_{1}

.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

PHYSICS

Watch in App

explore_more_icon

Explore more

Conductor and Insulators

Standard VII Physics

Join BYJU'S Learning Program

CrossIcon