JEE Main 2022 · 29 Jun · Shift 1 · Physics Q47

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PhysicsSingle correct+4 / -1Question 47 of 90

A parallel plate capacitor filled with a medium of dielectric constant 10, is connected across a battery and is charged. The dielectric slab is replaced by another slab of dielectric constant 15. Then the energy of capacitor will :

increase by 50%

decrease by 15%

increase by 25%

increase by 33%

Answer and worked solution

Official answer: A

Battery connected. $U=\frac12CV^2\propto K$ : $\frac{15}{10}=1.5$ , an increase of 50%.

(A)

Topics:Energy stored in a capacitor Dielectrics

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JEE Main 2022 · 29 Jun · Shift 1, Physics question 47