6a Electric Fields Quiz alevel edexcel

Millikan's oil drop experiment was conducted to measure the:

• Charge of an electron

• Mass of an electron

• Electric field strength between charged plates

• Magnetic field strength around a current-carrying wire

Electric field strength at a point is defined as the:

• Electric potential energy per unit charge

• Work done in moving a unit positive charge from infinity to that point

• Force experienced by a unit positive charge at that point

• Electric force acting on a unit negative charge at that point

Coulomb's law can be verified experimentally by measuring:

• The potential difference between two points

• The electric field strength between two points

• The force between two charges at different distances

• The charge of a single electron

Electric field lines represent the:

• Flow of electric charge

• Magnetic field around a current-carrying wire

• Direction of electric force experienced by a positive test charge

• Resistance of a material to electric current flow

Electric potential is a measure of:

• Electric field strength at a point

• The rate of change of electric field with distance

• The work done in bringing a unit positive charge from infinity to that point

• The amount of charge contained within an electric field

Combining electric fields involves:

• Adding their magnitudes

• Subtracting their magnitudes

• Adding them vectorially

• Multiplying their magnitudes

Potential difference between two points in an electric field is measured in:

• Joules

• Volts

• Coulombs

• Amperes

The potential at a point in a radial electric field due to a point charge is given by:

• V=kq/r

• V=kq/r^2

• V=kqr

• V=r/kq

The radial electric field strength formula for a point charge q at a distance r from it is given by:

• E=kq/r^2

• E=kq/r

• E=qr/k

• E=r/kq

Equipotential surfaces are surfaces where:

• Electric field strength is constant

• Potential energy is constant

• Electric potential is zero

• Electric field lines are perpendicular