Solved papers for JEE Main & Advanced JEE Main Paper (Held On 11 April 2014)
done JEE Main Paper (Held On 11 April 2014) Total Questions - 2
question_answer1) A cone of base radius R and height h is located in a uniform electric field \[\overset{\to }{\mathop{E}}\,\] parallel to its base. The electric flux entering the cone is:
[JEE Main Online Paper ( Held On 11 Apirl 2014 )
question_answer2) A parallel plate capacitor is made of two plates of length l, width w and separated by distance d. A dielectric slab (dielectric constant K) that fits exactly between the plates is held near the edge of the plates. It is pulled into the capacitor by a force\[F=-\frac{\partial U}{\partial x}\]where U is the energy of the capacitor when dielectric is inside the capacitor up to distance x (See figure). If the charge on the capacitor is Q then the force on the dielectric when it is near the edge is:
[JEE Main Online Paper ( Held On 11 Apirl 2014 )