With a potentiometer null point were obtained at 140 cm and 180 cm with cells of emf 1.1 V and one unknown `chi` volts. Unknown emf is

Question

With a potentiometer null point were obtained at 140 cm and 180 cm with cells of emf 1.1 V and one unknown `chi` volts. Unknown emf is

With a potentiometer null point were obtained at 140 cm and 180 cm with cells of emf 1.1 V and one unknown `chi` volts. Unknown emf is
A. 0.1V
B. 1.21V
C. 1.414V
D. 1.8V

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - C
`(E_(1))/(E_(2))=(l_(1))/(l_(2))`
`:.E_(2)=(l_(2))/(l_(1))E_(1)=(180xx1.1)/(140)=1.414V`

5 views Answered 2023-02-05 15:29