S2 Review H ; E-field

Front

What is an electric field?

Back

An electric field is a region around a charged particle where other charged particles experience a force. It is represented by electric field lines that indicate the direction and strength of the field.

Front

What is the unit of electric field strength?

Back

The unit of electric field strength is volts per meter (V/m).

Front

How does the distance from a charged object affect the electric field strength?

Back

The electric field strength decreases with increasing distance from the charged object, following an inverse square law.

Front

What is the principle of superposition in electric fields?

Back

The principle of superposition states that the total electric field created by multiple charges is the vector sum of the electric fields created by each charge individually.

Front

What is the relationship between electric force and electric field?

Back

The electric force (F) experienced by a charge (q) in an electric field (E) is given by the equation F = qE.

Front

What is the difference between positive and negative charges in terms of electric field direction?

Back

Electric field lines point away from positive charges and toward negative charges.

Front

What is the significance of equipotential surfaces?

Back

Equipotential surfaces are surfaces where the electric potential is the same. No work is done when moving a charge along an equipotential surface.

Front

What happens to the electric field between two parallel plates?

Back

The electric field between two parallel plates is uniform and directed from the positive plate to the negative plate.

Front

How can you determine the sign of a charge using a test charge?

Back

If a test charge is repelled, the source charge is of the same sign; if attracted, the source charge is of the opposite sign.

Front

What is the formula for calculating the electric field due to a point charge?

Back

The electric field (E) due to a point charge (Q) at a distance (r) is given by E = k * |Q| / r², where k is Coulomb's constant.