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Class 12 Physics Practice Test: Electric Field
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Class 12 Physics Practice Test: Electric Field
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15 Questions

1. Two point charges +4q and +q are kept at a distance of 30 cm from each other. At which point between them, the field intensity will be equal to zero?
2. A uniformly charged sphere of radius R has charge +Q. A point charge –q is placed at a distance of 2R from the center of the sphere. The point charge will execute the simple harmonic motion. The statement is _____
3. A ball of 80mg mass and a 2*10-8 charge is hung with a thread in a uniform horizontal electric field of 2*104V/m. What is the angle made by the thread with vertical?
4. Two point charges of the same polarities are hung with the help of two threads and kept close. The angle between the threads will be _________ if the system is taken to space.
5. Two point charges q1 and q2 are situated at a distance d. There is no such point in between them where the electric field is zero. What can we deduce?
6. V/m is the unit of ______
7. V/m is the unit of ______
8. The direction of electric field created by a negative charge is ___________
9. Find the electric field intensity at 10cm away from a point charge of 100 esu.
10. Electric field intensity at the center of a square is _____ if +20 esu charges are placed at each corner of the square having side-length as 10 cm.
11. What is the dimension of electric field intensity?
12. Electric field inside a hollow conducting sphere ______
13. An electron of mass m is kept in a vertical electric field of magnitude E. What must be the value of E so that the electron doesn’t fall due to gravity?
14. Find the electric field intensity at 10cm away from a point charge of 100 esu.
15. Electric field is a _______

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