Recent content by bbuilder

Homework Statement A metal rectangle is close to a long straight current carrying wire, with 2 sides parallel to the wire. If the current in the wire is decreasing, the rectangle is Homework Equations Lenz's Law: the direction of any magnetic induction effect is such to oppose the cause...

I'm confused about the velocity vector of the loop if the loop is stationary. I know for the right-hand rule, my pointer finger points in the direction of the velocity, my middle finger in the direction of the magnetic field, and my thumb in the direction of the force. Is the magnetic field...

Homework Statement A long straight wire carries a steady current. A square conducting loop is in the same plane as the wire. If we push the loop toward the wire, how is the direction of the current induced in the loop related to the direction of the current in the wire? Homework...

Homework Statement Two metal bars, 1 and 2, are identical in all ways, except that bar 2 has twice the width of 1. The bars are parallel to each other, but far apart from each other, in a uniform magnetic field and carry the same amount of current in a direction perpendicular to the field...

If the current is higher in the first wire, then the first wire must have a lower resistance. If the current is lower in the first wire, then the first wire must have a higher resistance.

Homework Statement Wires 1 and 2 are identical except that they are each made of a different material. The one end of wire 1 is connected to one end of wire 2. The two remaining ends are connected across a battery and current flows through the two wires. Is the potential difference is wires...

Would the potential for the arc be the same as the potential of the point because potential is scalar?

The potential would be the same at both a positive charge and a negative charge because potential is scalar. The electric field would point towards the negative charge. The sign of dV/dx is positive, but when the negative sign is taken into account then E is negative, so the electric field...

Homework Statement What is the potential at point P due to a point charge Q at a distance R from P? Set V=0 at infinity. The same charge has been spread uniformly over a circular arc of radius R and central angle of 40 degrees. What is the potential at point P at the center of this arc...

I know that V=∫Edl, but I'm having trouble connecting that to what the equipotential lines would look like.

Homework Statement The equipotential curves in a certain region of an equipotential diagram in an xy plane are parallel to the y-axis and are equally spaced. The potential is increasing in the +x direction. Which direction would an electric field vector point in this region? Homework...

The negatively charged chloride is on the -x-axis. The positively charged hydrogen is on the chloride ion has a force on the bromide ion at a positive angle above the horizontal. The positively

Homework Statement A hydrogen chloride molecule (HCl) has a partial positive charge on the hydrogen atom and a partial negative charge on the chlorine atom. The HCl molecule is placed at A. There will be force on the bromide ion in the +x direction. B. There will be force on...