NEET-XII-Physics
01: Electric Charges And Fields
- #2-anullnullWhat is the distance between the two spheres? (b) What is the force on the second sphere due to the first? (b) What is the force on the second sphere due to the first?Ans : Electrostatic force on the first sphere, F = 0.2 N
Charge on this sphere, q1 = 0.4 μC = 0.4 × 10-6 C
Charge on the second sphere, q2 = - 0.8 μC = - 0.8 × 10-6 C
Electrostatic force between the spheres is given by the relation,
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Where, `` \epsilon``0 = Permittivity of free space
``r^2=\frac{q_1q_2}{4\pi \epsilon F}=9× 10^9 × 0.4× 10^{-6}× 0.8× 10^{-6} × \frac{1}{0.2}=144× 10^{-4} ``
Hence `` r=\sqrt{144× 10^{-4}}=0.12m``
The distance between the two spheres is 0.12m. (b) Both the spheres attract each other with the same force. Therefore, the force on the second sphere due to the first is 0.2 N.
(b) Both the spheres attract each other with the same force. Therefore, the force on the second sphere due to the first is 0.2 N.
- #2-bWhat is the force on the second sphere due to the first?Ans : Both the spheres attract each other with the same force. Therefore, the force on the second sphere due to the first is 0.2 N.