Jawapan Gerak Gempur Fizik Bulan Julai

Question 1

1a) Lights with one colour or one wavelength.

1b) Constructive interference takes place and bright fringes are observed. Destructive interference takes place and dark fringes are observed.

1c) x= 4.05 =1.35 mm =1.358 X 10^-3m

3

λ= ax =0.5 X 10^-3 X 1.35 X 10^-3

D 1.5

=4.5 X 10^-7m

Question 2

2a) To measure gas pressure.

2b)

i. Volume in Diagram 2.1 is higher than Diagram 2.2.ii. The reading of Bourdon Gauge in 2.1 is lesser than 2.2.

iii. Temperature is constant.

2c) When the volume of gas decreases, the reading of Bourdon Gauge increases.

2d)Boyle’s Law.

2e)-When the volume of gas decreases, the collision per unit area increases.

- The pressure of gas will increase.

Question 3

3a) The region where a magnetic material experiences magnetic force.

3b)

i. Diagram 3.2 > Diagram 3.1ii. Diagram 3.2 > Diagram 3.1

3c) When the magnitude of current increases, the final position of copper rods increases.

3d)

i. The combination between the magnetic field due to permanent magnet and magnetic field due to current in the copper rod (conductor wire).Produces the resultant force that pushed the copper rods/catapults field.

ii. Fleming’s Left Hand Rule.

3e) Use stronger magnets.

Question 4

4a) Atmospheric pressure.

4b)i)

1. Volume in Diagram 4.1 is bigger.2. Mass of air trapped same.3. Pressure of air trapped in Diagram 4.2 higher.

4b)ii) The higher the volume of air trapped the smaller the air pressure./volume inversely proportional with pressure.

4c)

-The beaker accelerates upwards.

-Because buoyant force increases as depth increase/Weight of water displace increases.

-This is due to the depth of water increases. /Pressure of water is high.

- So buoyant force more than weight/resultant force.

4d)

i) Low density/strong/nylon -Light-Does not tear easily.

Big size -Buoyant force increase-Weight of water displace increase

ii) Gas burner -To heat up air in balloon/Reduce density of air in balloon.

iii)Rope tied to the balloon -Avoid the balloon moves away/to hold the balloon easy to descend the balloon.

iv)Early in the morning/ Late evening Air surrounding is cooler/High density.