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Grade: 11

                        

Two equal metal balls are charged to 10 and -20 units of electricity. Then they are brought in contact with each other and then again separated to the original distance. The ratio of magnitudes of the forces between the two balls is: (a) + 8 : 1 (b) 1 : 8 (c) +2 : 1 (d) 1 : 2

8 years ago

Answers : (1)

Anirban Mukherjee
47 Points
							

Initial Force =10X20/x^2

Final force=5X5/x^2

Charge=[10-20]/2=-5

F1/F2=200/25=8

 

 

 

8 years ago
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