Test

Question 1

Advantages of series circuit?

Answer 1

Single switch can control both

Question 2

Advantages of parallel circuit?

Answer 2

Independent control.

If one fails the other will still work.

Question 3

Can can a student measure a area of a odd 2D object?

Answer 3

Record outline of object on square paper
Count how many squares are taken up.
Number of squares cm is going to be area.

Question 4

Why should a heater be fitted with an earth wire?

Answer 4

Metal case, that conducts, prevents user from getting electric shock.

Question 5

Suggest why an object may travel further on a planet with less g then on earth?

Answer 5

Value of g lower

Lack of air resistance.

Question 6

Explain why shielding is needed?

Answer 6

Reactor material is radioactive
Can cause damage to tissues and organs
Radiation is very penetrating.

Question 7

Explain why resistance changes in filament lamp?

Answer 7

Lamp heats up
Greater chance of electron collision
Resistance increases.

Question 8

X-rays are ………. By bone?

Answer 8

Absorbed

Question 9

Sea water has greater….

Answer 9

Density