Chapters 25--Examples. Problem. The current in a wire varies with time according to the relation I=55A-(0.65 A/s 2 )*t 2 How many coulombs of charge pass through a cross-section of wire in the time interval from t=0 s to t=8 s?
The current in a wire varies with time according to the relation
A current-carrying gold wire has a diameter of 0.84 mm. The electric field is 0.49 V/m . What is
A beam contains 2 x 108 doubly charged positive ions per cubic centimeter, all of which are moving north with a speed of 1x105 m/s.
How long does it take electrons to get from a car battery to the starting motor? Assume the current is 300 A and the electrons travel through a copper wire with cross-sectional area 0.21 cm2 and length 0.85 m?