N5 Physics: Electricity

Question 1

What is electrical current?

Answer 1

Electric current is the electric charge transferred per unit time.

Question 2

What is one ampere (amp)

Answer 2

One amp is = One coulomb per second (Q= I x t) (I= Q / t) Per = divide

Question 3

What is the equation for charge and what do the elements of the equation mean?

Answer 3

(Q = I x t)
Q= Charge in coulombs (C)
I= Current in amperes/amps (I)
t= Time in seconds (s)

Question 4

In alternating currents what happens to the direction of the movement of the electrons?

Answer 4

The direction of movement of the electrons continually reverses. (Mains supply is a.c)

Question 5

In direct currents what happens to the direction of the movement of the electrons?

Answer 5

The electrons flow in one direction only

Question 6

Opposite charges ____ and like charges____

Answer 6

Opposite charges attract and like charges repel.

Question 7

Name the three components of an atom

Answer 7

Proton, Neutron and Electron

Question 8

Electrons have a ___ charge and ___ to move. Protons have a ___ charge and ___ to move. Neutrons have ___ charge.

Answer 8

Electrons have a NEGATIVE charge and ARE FREE to move. Protons have a POSITIVE charge and ARE NOT FREE to move. Neutrons have NO charge.

Question 9

What is potential difference (voltage)

Answer 9

Voltage is the measure of energy given to