JEE Advanced 2020 Full Test 7 Paper 2

Question : 8 of 54

Marks: +1, -0

A capacitor with air as dielectric has capacity C as shown in figure is completely filled with dielectric slab of mass M and is connected to a block of mass M. The system is released form rest at time t=0 when the capacitor is completely filled with dielectric. Then:
(Dielectric constant of slab =K )

Charge on the plate of the capacitor when it is half filled with air is ‌
(K+1)CV
2
The kinetic energy of the block when the capacitor is half filled with dielectric is ‌
mgℓ
4
−‌
CV2(K−1)
8
The potential difference between the plates when the capacitor is half filled with air is V
The energy stored in the capacitor when it is half filled with dielectric is ‌
K
2
CV2.

Validate

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