Tbr physics passage 1 electrostatics

[crazy person]

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For question 4, how do we know which right hand rule to use?

Since the question is asking which way does the induced current flow, I'm using my thumb to the right and my fingers into the page but then I come up with the force. And then I did, my thumb pointing to the right (velocity) and bending my fingers around the wire which gives me the field into the page but I'm more confused now because the answers are counterclockwise and clockwise?????

 

[QrtrLifeCrisis]

For question 4, how do we know which right hand rule to use?

Since the question is asking which way does the induced current flow, I'm using my thumb to the right and my fingers into the page but then I come up with the force. And then I did, my thumb pointing to the right (velocity) and bending my fingers around the wire which gives me the field into the page but I'm more confused now because the answers are counterclockwise and clockwise?????

Post the question.

 

[crazy person]

Post the question.

The question comes from Passage 1 from TBR #4) For the circuit in Figure 2, which way does the induced current flow?

 

[QrtrLifeCrisis]

The question comes from Passage 1 from TBR #4) For the circuit in Figure 2, which way does the induced current flow?

Some of us don't have access to TBR.

 

[dcamkl1]

Looking at my book, the question is:

"For the circuit in Figure 2, which way does the induced current flow?"

A. Counterclockwise
B. Clockwise
C. Clockwise, and then counterclockwise
D. No current will flow

The figure (#2) in question has a conducting rod that moves through a magnetic field pointing into the page. The ends of the rod touch the wires of a partial circuit (one resistor, no emf source) to the left of it.

To the OP, using the Right-hand rule according to TBR: thumb points left (with the motion of the rod), fingers into the page (with the B-field). Fmag points up for a positive charge. And since current, by definition, is the movement of positive charges, Fmag generates a current going up (in the direction of your palm) and "traces" the circuit, which is counter-clockwise.

I, too, use to have problems with different variations and applications of the right-hand rule, but I've found what I did above works in the practice problems I've encountered.