PhysicsAdvancedHigh School (11–12)Electricity & Magnetism › Electric Potential and CapacitanceNEETAEEE (Amrita)AMUEEEAP EAPCETBCECECMI Entrance
Created by StemPy LabAssertion (A): A thin ring carries a uniformly distributed positive charge . The electric potential at the centre of the ring is not zero. Reason (R): The electric field at the centre of the ring is zero, because the field of every small element is cancelled by the field of the element diametrically opposite to it.
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← Assertion (A): A 2.0 µF capacitor and an 8.0 µF capacitor are joined in series across a 100 V battery. The 8.0 µF capacitor stores more energy than the 2.0 µF capacitor. Reason (R): In a series combination every capacitor carries the same charge, and the energy stored in a capacitor of charge Q is Q²/2C.The figure shows three equipotential circles of an isolated point source in vacuum, with the potential zero very far away. (i) The magnitude of the field at A is four times that at B. (ii) The field does no work on a +1.0 µC charge taken from B to C. (iii) An agent must do 60 µJ to take a +2.0 µC charge slowly from D to A. (iv) The source carries a negative charge. (v) The magnitude of the field at A is 90 V cm⁻¹. How many of the statements above are correct? →
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