Physics Paper 1 lost marks

Question 1

what is meant by a zero error for an ammeter

Answer 1

Ammeter displays a reading when it’s not connected

Question 2

which side is the positive in the battery and how does the current move

Answer 2

left side of cell is positive and current moves from positive to negative

Question 3

convert 50 mA into Amps

Answer 3

0.05A

Question 4

Tesla conversions

Question 5

how do you work out percentage increase

Answer 5

(final - original)/original *100

Question 6

give two reasons for using gas over coal

Answer 6

Any two from:
* no sulfur dioxide released
* doesn’t cause acid rain
* no particulates released
* doesn’t cause global dimming
* less carbon dioxide released
(per kg of fuel burned)
* less global warming
* no solid waste
* gas mining is less destructive
than coal mining

Question 7

what is a tesla in unit of measure

Answer 7

Tesla is the unit of measurement to define the magnetic flux density.

Question 8

what is the magneetic flux densiity

Answer 8

Magnetic flux density is the measure of the strength of the magnetic field.

Question 9

At the bottom of the slide, all riders and their sleds have approximately the same speed. Explain why.

Answer 9

1/2mv^2 = mgh
-masses cancel on both sides of the equation
-Final speed only depends on vertical height
variation will bee due to air resistance/friction

Question 10

why are amount of resistances and mean resistance inversely proportional

Answer 10

n * R = constant

Question 11

statement which describe movement of gas particales in a balloon of helium

Answer 11

thee particles move in random direction.
the particles move in a range of speeds.

Question 12

Explain why the pressure exerted by the helium inside the balloon would increase

Answer 12

higher kinetic energy, greater forces