GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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5.625 x 109
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5.625 x 10-9
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4.5 x 1010
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4.5 x 10-10
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Detailed explanation-1: -Coulomb’s law calculates the magnitude of the force F between two point charges, q1 and q2, separated by a distance r. F=k|q1q2|r2. k=8.988×109N⋅m2C2≈8.99×109N⋅m2C2.
Detailed explanation-2: -Find the force between 2C and-1C separated by a distance 1m in air(in newton). Explanation: F = q1q2/(4∏or2) =-2 X 9/(10-9 X 12) =-18 X 109.
Detailed explanation-3: -The force between two electric charges is called electrostatic force.
Detailed explanation-4: -According to Coulomb’s law, the force of attraction or repulsion between two charged bodies is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. It acts along the line joining the two charges considered to be point charges.