Eduqas A-Level Physics Fields and the universe overview quiz quiz

It doubles in magnitude

It is reduced to one half

It stays completely unchanged

It falls to a quarter

Gravity is always attractive, while electrostatic forces can attract or repel

Gravity is by far the stronger of the two fundamental forces at every distance

Electrostatic forces obey an inverse-cube power law instead of an inverse-square law

Gravity acts only on electric charges, whereas electrostatic forces act on all masses

Air resistance

Gravity

The magnetic field

Its own thrust

$T \propto r$

$T^3 \propto r^2$

$T^2 \propto r^3$

$T \propto r^2$

$F = \frac{BI}{L}$

$F = \frac{BL}{I}$

$F = B^2IL$

$F = BIL$

The magnetic force is always perpendicular to the velocity, providing a centripetal force

The magnetic force continuously speeds the particle up until it spirals outward forever

The magnetic field does positive work on the charge and steadily increases its kinetic energy

Gravity acting on the moving particle is what bends its straight-line path into a circle

The total flux linkage through the coil

The rate of change of flux linkage

The magnetic flux density of the field

The number of turns on the coil only

Aids and reinforces the change producing it

Flows in one fixed direction regardless

Opposes the change producing it

Is always exactly zero in every case

$\lambda_\text{max} = bT$

$\lambda_\text{max} = \frac{T}{b}$

$\lambda_\text{max} T^4 = b$

$\lambda_\text{max} T = b$

The fourth power

The first power only

The square of the temperature

The square root of the temperature

They are approaching us at high speed

They are receding from us

They are completely stationary relative to us

They are steadily getting hotter over time

The yellow colour of light emitted by the Sun

The orbit of the Moon

The cosmic microwave background radiation

The changing brightness of Venus through the year