HW1 When a current of 2 A flows for 3 micro-seconds in a coper wire, estimate the number of electrons crossing the cross-section of the wire. Hint : With 2 A for 3 µ Sec, charge transferred = 6 µ-coulombs (Bombay University, 2000) %3D
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- 2. A mobile -4C charge, initially at rest, is located 3.5m away from a fixed, stationary charge of value+250C. Determine the change in potential energy when the mobile charge is brought to a location 1.2maway from the fixed charge.Solve the following problems with complete solutions and units using 2 decimal digits: A 1,000 ft. of aluminum wire, whose diameter is 0.365 in., has a resistance of 0.13 Ω at 20°C. What is its percent conductivity?.A secondary battery containing Li and Lead acid weighing 60 g that operates continuously through 16 ohms resistance for 300 min .The initial voltage is 3.60 V and the effective voltage over the whole life of the battery is taken to be 1.00.Theoretically, how many miles above the earth could thus battery be raised by the energy delivered under these conditions?