Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm and have identical sizes. A third sphere of the same size but uncharged is brought in contact with the first, then brought in contact with the second, and finally removed from both. The new force of repulsion between A and B is? 5.7?10?3/N
15) Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm and have identical sizes. A third sphere of the same size but uncharged is brought in contact with the first, then brought in contact with the second, and finally removed from both. What is the new force of repulsion between A and B?
Answer is:
5.7?10?3/N
Explanation:
Related Optics MCQ with Answers
Answer is:
v/u
Explanation:
Magnification produced by a lens m is given by v/u
Answer is:
1/f
Explanation:
The power P of a lens is given by the approximate formula 1/f
Answer is:
230 V 50 Hz
Explanation:
Domestic power supply in India is 230 V 50 Hz
19) If several thin lenses of focal length?f1,f2,f3, ? are in contact, the effective focal length is
Answer is:
1/f=1/f1 + 1/f2 + 1/f3 +?
Explanation:
harmonic mean of all focal length