paper 1

Question 1

acceleration in free fall

Answer 1

10m/s 2
or
9.81 m/s 2

Question 2

mechanical advantages formula

Answer 2

load / effort

Question 3

gradient in distance time graph

Answer 3

speed

Question 4

gradient in velocity time graph

Answer 4

acceleration

Question 5

gradient on voltage / current graph

Answer 5

gradient is inverse the resistance

1/ gradient = resistance

Question 6

magnetic dropped in tube

Answer 6

à changing magnetic field
induce p.d across ends
produces a current
generates a magnetic field (opposes change)

Question 7

area under velocity time graph

Answer 7

distance travelled

Question 8

how is voltage induced in a transformer

Answer 8

Alternating current
produces changing magnetic field onto soft iron core
changing p.d in secondary coil

Question 9

purpose of dipping compass

Answer 9

points to magnetic north pole

at 90o at the north and south magnetic pole and zero at equator

Question 10

detention of p.d

Answer 10

energy transferred per unit charge

Question 11

why does current slightly decrease in a filament bulb

Answer 11

resistance increase due to heat
collisions between electrons and metal ions increase
as a result current decrease

Question 12

acetate rods become

Answer 12

positive

Question 13

polyethene rods become

Answer 13

negative

Question 14

static charge only builds up on

Answer 14

insulators