prep 3 unit 2 lesson 1 part 1

1. Electrons are --------- charged particles.

• a. positively

• b. neutral

• c. negatively

• d. variable

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

• a. resistance.

• b. electric current intensity

• c. electric current.

• d. potential difference.

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

• a. coulomb

• b. ampere

• c. volt

• d.ohm

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

• ampere.

• volt. .

• ohm

• coulomb.

The ampere = .............................

• 
• 
• 
• 

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-section 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.

• d.ohm.

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

• potential difference

• current intensity

• resistance

• emf