# Electric charge: Quiz

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More interesting facts on Electric charge

Question 1: The charge of an ________ equals that of the corresponding particle, but with opposite sign.
AntiparticleQuantum field theoryAntiprotonElectron

Question 2: Coulomb's law quantifies the electrostatic ________ between two particles by asserting that the force is proportional to the product of their charges, and inversely proportional to the square of the distance between them.
ForcePhysicsClassical mechanicsEnergy

Question 3: Even when the net charge is zero, it can be distributed non-uniformly (e.g., due to an external ________ or to molecular motion), in which case the material is said to be polarized.
Electric fieldLorentz forceMagnetic fieldMaxwell's equations

Question 4: The study of charged particles, and how their interactions are mediated by ________, is quantum electrodynamics.
AtomElectronStandard ModelPhoton

Question 5: Aside from the properties described in articles about ________, charge is a relativistic invariant.
Magnetic fieldElectromagnetismMaxwell's equationsClassical electromagnetism

Question 6: The charges of free-standing particles are integer multiples of the ________ e; we say that electric charge is quantized.
ElectronPlanck constantElementary chargePhysical constant

Question 7: More generally, in every molecule, the number of ________ (negatively charged atoms) equals the number of cations (positively charged atoms).
ElectrolyteIonLithium-ion batteryHalf cell

Question 8: Franklin imagined electricity as being a type of invisible fluid present in all matter; for example he believed that it was the ________ in a Leyden jar that held the accumulated charge.
Cranberry glassMACORBorosilicate glassGlass

Question 9: When the net electric charge is non-zero and motionless, the phenomenon is known as ________.
ElectrostaticsElectrostatic inductionOzoneStatic electricity

Question 10: The motion of charged particles (especially the motion of electrons in metals) in a given direction is known as ________.
Maxwell's equationsElectric currentMagnetic fieldElectric charge