#1.Two long straight parallel wires separated by a distance of 20cm carry currents of 30A & 40A in opposite directions. What is the magnitude of the resulting magnetic field at a point 15cm from the wire carrying the 30A current & 25cm from the other wire?
#2.A point charge -Q is @ the center of a spherical conducting shell of inner radius R1 & outer radius R2. The charge on the inner surface of the shell is?
#3.If the current through a long solenoid is doubled while the coil's length is also doubled, keeping the total number of turns constant, the magnetic field at a point inside near the axis is?
#4.Two resistors are connected in parallel across a potential difference. The resistance of resistor A is twice that of resistor B. If the current carried by resistor A is I, then what is the current carried by B?
#5.Two identical bar magnets are dropped from equal heights. Magnet A is dropped from above the bare earth, whereas magnet B is dropped above a metal plate. Which will strike 1st?
2007-12-02 10:55:37 · 1 answers · asked by none 1 in Science & Mathematics ➔ Physics
You'd have more luck cheating if you broke it into 5 questions. Or is even that too much work?
2007-12-09 16:39:01 · answer #1 · answered by Dr. R 7 · 1⤊ 0⤋