Quiz on unit 2

The measuring unit of the amount of electricity is the coulomb, it doesn't equal with ....

• amp×sec

• joule ÷ volt

• volt × joule

• a and b

The measuring unit of e.m.f is ....

• coulomb

• ampere

• ohm

• volt

The value of the work done to transfers a quantity of electric charges of one coulomb between two poles of this conductor is the ....

• ohm

• potential difference

• current intensity

• electric resistance

The joule equals ....

• volt/coulomb

• volt × coulomb

• coulomb/sec

• volt/sec

When 1.5 V is written on an electric cell,this means that it's ....... equals 1.5 volt.

• electric intensity

• e.m.f

• storage energy

• resistance

The ..... is used to measure the electric resistance.

• ammeter

• voltameter

• ohmmeter

• rheostat

If an electric current of 0.2 ampere flows through an electric heater and the potential difference between it's two ends is 220 volt, whose resistance equal ...... ohm.

• 1100

• 11

• 110

• 11000

An electric current, whose intensity is one ampere passes through a resistance of 20 ohm, then the intensity of the electric current increases to 2 ampere in the same resistance, so the value of resistance ......

• increase to double

• decrease to half

• decrease to quarter

• doesn't change

In rheostat, slider os moved on ..... bar

• aluminium

• copper

• carbon

• iron

Direct current can be produced from ....

• electrochemical cells

• electric generators

• electric power station

• electric motors