Class 12th Physics 2018 Set1 Delhi Board Paper Solution
Define electric flux. Is it a scalar or a vector quantity? A point charge q is at a distance d/2 directly above the centre of a square of side ‘d’, as shown in the figure. Use Gauss’s law to obtain the expression for the electric flux through the square.
(b) If the point charge is now moved to a distance ‘d’ from the centre of the square and the side of the square is doubled, explain how the electric flux be affected.
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Recently Viewed Questions of Class 12th physics
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(a) A conductor A with a cavity as shown in Fig. 1.36 (a) is given a charge Q. Show that the entire charge must appear on the outer surface of the conductor.
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Two moving coil meters, M1 and M2 have the following particulars:
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, approximately.[Such an arrangement to produce a nearly uniform magnetic field over a small region is known as Helmholtz coils.]
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Figure shows a potentiometer circuit for comparison of two resistances. The balance point with a standard resistor R = 10.0 Ω is found to be 58.3 cm, while that with the unknown resistance X is 68.5 cm. Determine the value of X. What might you do if you failed to find a balance point with the given cell of emf Ω µ?
