A straight wire of length 70 cm carries a current of 50 A and makes an angle of 60° with a uniform magnetic field. If the force on the wire is 1.0 N what is the magnitude of B?
a. 41 mT
b. 33 mT
c. 55 mT
d. 87 mT
e. 57 mT
B
You might also like to view...
A force of 500 N is applied to a rod with a diameter of 4.00 mm. The stress in the rod is
a. 
b. 
c. 
d. 
e. 
Why are auroras produced only near the northern and southern magnetic poles of a planet?
a. Those are the locations where the atmosphere is thinner, letting particles penetrate. b. The poles are pointing toward the Sun, so they receive more solar wind particles. c. The oxygen atoms responsible for auroral emission only exist near the poles. d. Charged particles are forced to flow along Earth's magnetic field lines, which come out of Earth's poles.
Diamond and graphite are
a. similar in physical properties. b. composed of the same element. c. of the same crystalline structure. d. bonded in the same manner.
What is the use of the Doppler effect able to tell you about the motion of an object? What is it unable to tell you?
What will be an ideal response?