A metallic sphere has a charge of 10uC. A unit negative charge is brought from (A) to (B), both 100 cm away from the sphere but (A) being east of it while (B) being on west. The net work done on the unit negative charge is:-
(A) Zero
(B) 2/10 joules
(C) -2/10 joules
(D) -1/10 joules In the figure given below, the magnetic field
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Answer:
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Answer:
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Step-by-step explanation:
According to question,
Work done =W (Change in potential energy )
W=Uf−Ui
Ui=4πC111×10×10−6 (Ui is the initial potential energy when unit is lying east)
Uf=4πC111×10×10−6 (Uf is the final potential energy when unit is lying west)
W=4πC111×10×10−6−4πC111×10×10−6
=0
W=0
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