JEE HYSICS UNIT 11
QUIZ NO 1
TOTAL QUESTIONS = 20


1. Three charges +Q, q, +Q are placed respectively at distances 0, d/2, and d from the origin on the x-axis. If the net force experienced by +Q placed at x = 0 is zero, then the value of q is


2. A parallel plate capacitor having capacitance 12 pF is charged by a battery to a potential difference of 10 V between its plates. The charging battery is now disconnected, and a porcelain slab of dielectric constant 6.5 is slipped between the plates. The potential difference between the plates now is


3. A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The potential at the center of the sphere is


4. Two point charges Q and -Q are placed at points (a, 0, 0) and (-a, 0, 0) respectively. The electric potential at the origin is


5. The electric field inside a conductor is


6. The capacitance of a parallel plate capacitor does not depend on


7. Two identical metallic spheres A and B are given charges of +2Q and -Q, respectively. If they are brought in contact and then separated by a distance d, the force between them is


8. The work done in moving a charge q from point A to point B in an electric field is independent of the path if the field is


9. A point charge q is placed at the center of a cube of side a. The electric flux through one of its faces is


10. The potential energy of a system of two point charges q₁ and q₂ separated by a distance r in a medium of dielectric constant K is


11. An electric dipole of moment p is placed in a uniform electric field E. The torque acting on it is


12. The electric field due to a uniformly charged infinite plane sheet is


13. The energy stored in a capacitor of capacitance C charged to a potential difference V is


14. The electric potential due to a dipole at a point on its axial line at a distance r from the center is proportional to


15. Two charges q₁ and q₂ are separated by a distance d. The electric field at the midpoint between the two charges is zero if


16. The capacitance of a spherical conductor of radius R is


17. The electric field at a point on the perpendicular bisector of a dipole is


18. A metallic shell has a point charge q at its center and another charge Q on its surface. The force on q due to Q is


19. The electric potential at a point on the equatorial line of a dipole is


20. Two capacitors of capacitances C₁ and C₂ are connected in series. The equivalent capacitance is



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