2.1

Question 1

What is work done?

Answer 1

the measure to calculate the energy that has been transferred when an object is moved between two points in an electric field.

Question 2

Break down the equation W = QV

Answer 2

W = work done (J)
Q = Charge (C)
V = voltage (V)

Question 3

Suggest an equation that can be used to calculate the speed of a particle travelling in an electric field.

Answer 3

Ek = 1/2mv^2

Question 4

What produces a magnetic field?

Answer 4

a moving charge

Question 5

How can you determine the direction of a magnetic field around a moving electron?

Answer 5

Using the left hand grip rule, the thumb pointing up represents the direction of the electron and the clasped fingers represent the magnetic field direction.

Question 6

How can you determine the direction of a magnetic field around a moving proton?

Answer 6

Using the right hand grip rule, the thumb pointing up represents the direction of the proton and the clasped fingers represent the magnetic field direction.

Question 7

How do you determine the direction of the force on a electron in a magnetic field? (4 stages)

Answer 7

Stage 1 - open your right hand and extend all of your fingers. Close your ring finger and little finger, and flex your middle finger until it is at a 90 degree angle to your palm. Your thumb and index finger should still be extended.

Stage 2 - your thumb represents the direction of the force on the charge particle.

Stage 3 - Your index finger represents the direction of the magnetic field.

Stage 4 - your middle finger represents the direction of the current.

Question 8

What is the role of the particle accelerators?

Answer 8

To speed up subtomic particles for high-energy collisions. These collisions produce other particles and can be used to research the composition of fundamental particles

Question 9

How do particle accelerators speed up charged particles?

Answer 9

Particles are accelerated using electric fields, provided by a power supply.

Magnetic fields are used to control the direction of charged particles.

Question 10

What happens when a positive and a negative charge meet?

Answer 10

opposites charges attract

Question 11

What happens when a positive and a positive charge meet?

Answer 11

same charges repel

Question 12

3 examples of electrostatic electricity

Answer 12

1. charging a plastic rod by rubbing it with a cloth and using it to pick up pieces of paper
2. rubbing a balloon on a jumper and sticking it to a wall
3. car companies to ensure that spray guns paint cars evenly

Question 13

What happens to charge moving in the opposite direction?

Answer 13

If the charge is moved in the opposite direction to the electric field, its electrical potential energy will increase since the energy required to move it aganst the field is stored.

Question 14

What happens to charge moving in the same direction?

Answer 14

If the charge moves in the direction of the electric field, its kinetic energy will increase due to the work done on it by the electric field.