PhysicsAdvancedHigh School (11–12)Electricity & Magnetism › Current ElectricityNEETAEEE (Amrita)AMUEEEAP EAPCETBCECECMI Entrance
Created by StemPy LabFive statements about cells and internal resistance are given. (i) With no current drawn, the terminal voltage of a cell equals its emf. (ii) A cell of internal resistance , joined by a thick wire of negligible resistance, supplies . (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?
← All Quizzes
← Coil X alone, on a 230 V supply, boils a kettle of water in 20 min. Coil Y alone takes 5 min. 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. 10 min II. 25 min III. 80 min IV. 4 minFour identical cells each have emf E and internal resistance r. Match each arrangement with the single equivalent cell. List-I (Arrangement) A. All four in series B. All four in parallel C. In series, with one cell reversed D. Two parallel rows of two cells in series List-II (Equivalent cell) I. emf 2E, resistance r II. emf E, resistance r/4 III. emf 4E, resistance 4r IV. emf 2E, resistance 4r →
Discussion (0)
Log in to join the discussion.
Loading…