3pr 2nd Sci U2L1:The Physical Properties of the Electric Current

Electrons are …........ charged particles.

• positively
• neutral
• negatively
• variable

The flow of electric charges through a metal wire represents …...........

• resistance.
• electric current intensity.
• electric current.
• potential difference.

The ….............. is the measuring unit of the electric charges.

• coulomb
• ampere
• volt
• ohm

The measuring unit of the electric current intensity is …...........

• ampere.
• volt.
• ohm.
• coulomb.

The ampere = …...........

• joule/coulomb
• coulomb/sec.
• joule/sec.
• sec./coulomb

If a quantity of electricity 30 coulomb passes in a time 10 second through a conductor so the current intensity equals …..... ampere.

• 300
• 3
• 40
• 30

The quantity of electricity flow in a conductor on passing electric current of intensit (2 ampere) through a cross-section of a conductor within a time (20 minute) equal …..... coulomb.

• 10
• 20
• 4
• 2400

The …....... is known as the quantity of electric charges flowing through a cross-sectio of the conductor in one second.

• ampere
• coulomb
• electric resistance
• current intensity

The charges which transmitted by a current of one ampere in one second, is known as …..........

• coulomb.
• volt.
• ampere.
• ohm.

The ammeter is used to measure the ….......... in the electric circuit.

• potential difference
• current intensity
• resistance
• e.m.f