PhysicsHardHigh School (11–12)Electricity & Magnetism › Current ElectricityJEE MainNEETAEEE (Amrita)AMUEEEAP EAPCETBCECE
Created by StemPy LabCoil X alone, on a supply, boils a kettle of water in . Coil Y alone takes . Heat losses are negligible. Match each arrangement with the time it needs. List-I (Arrangement) A. X and Y in series B. X and Y in parallel C. Y alone, with twice the water D. X alone, at half the supply voltage List-II (Time to boil) I. II. III. IV.
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← In a Wheatstone bridge, the arms P and Q are in series on one side and R and S are in series on the other, with P and R meeting at one battery terminal. The galvanometer joins the junction of P and Q to the junction of R and S. Statement I: If the battery and the galvanometer of a balanced bridge are interchanged, the galvanometer shows a deflection. Statement II: A bridge with P = 10 Ω, Q = 20 Ω, R = 30 Ω and S = 50 Ω is balanced.Five statements about cells and internal resistance are given. (i) With no current drawn, the terminal voltage of a cell equals its emf. (ii) A 1.5 V cell of internal resistance 0.50 Ω, joined by a thick wire of negligible resistance, supplies 3.0 A. (iii) Three identical cells in parallel have three times the emf of one cell. (iv) A cell that is supplying current has a terminal voltage above its emf. (v) Two unequal cells in parallel, like terminals joined and nothing else connected, carry no current. How many are correct? →
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