IB Physics D.2 Electric and Magnetic Fields Questionbank

Tangent to the equipotential line

Away from the charge

Perpendicular to the field lines

Toward the charge

It increases

It decreases

It remains constant

It becomes zero

Increasing the plate separation

Decreasing the potential difference

Increasing the potential difference

Reversing the polarity of the plates

$4.5\text{ V m}^{-1}$ in the positive $x$-direction

$450\text{ V m}^{-1}$ in the negative $x$-direction

$450\text{ V m}^{-1}$ in the positive $x$-direction

$0\text{ V m}^{-1}$ throughout the region

The force on $A$ is zero because it is at the center of the field.

The force on $A$ is towards the top of the diagram, where the field lines diverge.

The force on $A$ is towards the bottom of the diagram, where the field lines converge.

The force on $A$ is from left to right, in the direction of the electric field lines.