CCEA A-Level Physics A2 2 Fields, Capacitors, Particles and Astronomy overview quiz quiz

Attractive

Repulsive

Zero

Always equal to gravity

V times d

V over d squared

V over d

d over V

Only electric fields obey an inverse-square law, whereas gravity follows a linear law

Only gravity has an associated potential, since electric fields store no potential energy

They behave in exactly the same way and obey identical force and potential laws

Gravity is always attractive, but electric forces can attract or repel

Charge per unit voltage

Charge times voltage

Voltage per unit charge

Energy per unit charge

The reciprocals of their capacitances add to give the total capacitance

Their capacitances add directly

They cancel out and the combination stores no net charge at all

The smallest capacitor dominates and fixes the total combined value

0 percent of its initial value

50 percent of its initial value

37 percent of its initial value

63 percent of its initial value

Fleming's right-hand rule

Lenz's law alone

The corkscrew rule

Fleming's left-hand rule

Rate of change of flux linkage

Total magnetic flux passing through the coil at that instant

Instantaneous current flowing in the turns of the coil

Magnetic flux density of the field threading the coil

A quark and an antiquark

Three quarks

Two leptons

A quark and a lepton

They bond together permanently to form a stable neutral particle

They repel one another strongly and move apart without interacting

They annihilate, converting their mass into photons

Nothing happens and both particles continue unchanged

The number of photons

The total speed

The number of quarks per particle

Baryon number

The universe is expanding

The galaxies are heating up

Light is slowing down

The galaxies are moving towards us