Practise IB Physics HL D.2.15 Electric fields and equipotentials with questions connecting electric fields, potential difference and work.
This question is about electric potential and electric field.
A metal sphere of radius 0.080 m is charged to a potential of 300 V .
State the value of the magnitude of the gradient of electric potential at a distance of 0.16 m from the centre of the sphere.
A6. This question is about the motion of a copper rod in a magnetic field.
A copper rod XY is able to move freely along two horizontal, parallel conducting rails A and B . The conducting rails are in a region of uniform magnetic field that is in a direction perpendicular to the plane of the rails. The rails are connected together at one end by a conducting wire.
In the situation shown, the rod is moved along the rails at a constant speed v by a constant horizontal force of magnitude F.