A potentiometer wire of length 10 m and resistance 20 Ω is connected in series with a 25 V battery and an external resistance 30 Ω. A cell of emf E in secondary circuit is balanced by 250 cm long potentiometer wire. The value of E (in volt) is x/10. The value of x is _ _ _ _ _.

Current Electricity: JEE Main 2022 Physics question

JEE Main 2022 · 24 Jun, Evening shift · Q63

JEE Main 202224 Jun, Evening shiftPhysicsMediumCurrent Electricity150× since 2002

A potentiometer wire of length 10 m and resistance 20

\Omega

is connected in series with a 25 V battery and an external resistance 30

\Omega

. A cell of emf E in secondary circuit is balanced by 250 cm long potentiometer wire. The value of E (in volt) is

{x \over {10}}

. The value of x is __________.

Your answerType your answer. Integers and decimals are accepted.

JEE Main 2022 Current Electricity Question with Answer (24 Jun Evening shift, Q63) | JEE Arc