Question
First person to get all right gets full points!
How much current is flowing in a wire 4.95 m long if the maximum force on it is 0.725 N when placed in a uniform 0.0700-T field? Express your answer to three significant figures and include the appropriate units. Find the direction of the force on a negative charge for each diagram shown in the figure, where v (green) is the velocity of the charge and B (blue) is the direction of the magnetic field. ( means the vector points inward. means it points outward, toward you.) Jumper cables used to start a stalled vehicle often carry a 65-A current. How strong is the magnetic field 4.0 cm from one cable? Express your answer to two significant figures and include the appropriate units. Compare to the Earth's magnetic field (5.0x 10-5 T). Express your answer using two significant figures. A vertical straight wire carrying an upward 26-A current exerts an attractive force per unit length of 7.8x10"4 N/m on a second parallel wire 6.5 cm away. What is the magnitude of the current in the second wire? Express your answer to two significant figures and include the appropriate units. What is the direction of the current in the second wire?
Explanation / Answer
20.02 )current=2.09 A
20.12 )
part a-right
b-right
c-downward
d-outward to the screen
e-no force
f-upward
