- #1
nautica
I feel pretty confident in the rest of the problems and am down to these. I appreciate the help.
16) 2 long straight wires are parallel and carry current in the same direction. the currents are 8 A and 12 A and separated by 0.4 cm. The mag field in tesla at a point midway between the wires is?
I used B=uI/2(pie)r but did not come up with the right answer.
20) a uniform magnetic field is directed into the page. A charged particle, moving in the plane of the page, follows a clockwise spiral of decreasiing readius. An explanation would be.
My answer is: the charge is poistive and slowing down
21) electrons are going around a circle in a counterclockwise direction. At the center of the circle they produce a magnetic field that is:
My answer: out of the page
24) 2 parrallel wires, 4 cm apart, carry currents of 2 A and 4 A respectively, in opposite directions. The force per unit length on of one wire on the other is:
4 x 10^-5 attractive
26) Units of magnetic field might be:
a) C m/s
b) C s/m
c) C/kg
d)kg/C s
e) N/C m
23) The units of motional emf are:
a) volt/second
b) volt meter/second
c) volt/tesla
d) tesla/second
e) tesla meter^2/second
I don't have a clue on 23 or 26
thanks
nautica
16) 2 long straight wires are parallel and carry current in the same direction. the currents are 8 A and 12 A and separated by 0.4 cm. The mag field in tesla at a point midway between the wires is?
I used B=uI/2(pie)r but did not come up with the right answer.
20) a uniform magnetic field is directed into the page. A charged particle, moving in the plane of the page, follows a clockwise spiral of decreasiing readius. An explanation would be.
My answer is: the charge is poistive and slowing down
21) electrons are going around a circle in a counterclockwise direction. At the center of the circle they produce a magnetic field that is:
My answer: out of the page
24) 2 parrallel wires, 4 cm apart, carry currents of 2 A and 4 A respectively, in opposite directions. The force per unit length on of one wire on the other is:
4 x 10^-5 attractive
26) Units of magnetic field might be:
a) C m/s
b) C s/m
c) C/kg
d)kg/C s
e) N/C m
23) The units of motional emf are:
a) volt/second
b) volt meter/second
c) volt/tesla
d) tesla/second
e) tesla meter^2/second
I don't have a clue on 23 or 26
thanks
nautica