Paper 1

Question 1

Newtons First Law

Answer 1

An object at rest will stay at rest unless a resultant force acts on it

Question 2

Newtons Second Law

Answer 2

Acceleration of a body is directly proportional to the resultant force acting on the body and the change takes place in the direction of the force (F=ma)

Question 3

Newtons Third Law

Answer 3

For every reaction there is an equal and opposite reaction

Question 4

Factors affecting EMF induced (dynamo)

Answer 4

Strength of magnet
The rate at which magnet is inserted or removed from coil
Number of turns in the coil

Question 5

Factors affecting EMF induced (transformers)

Answer 5

Current
Number of turns
Iron core

Question 6

Lenz’s Law

Answer 6

The current induced in a conductor always flows in such a direction as to oppose the change producing it

Question 7

Faraday’s Law

Answer 7

The magnitude of the induced EMF is directly proportional to the rate of change of flux linked with the conductor

Question 8

Conservation Laws in Decays

Answer 8

Conservation of charge applies
Charge of particle before equals charge of two particles after
Conservation of energy applies
Energy of original particle equal to that of the two after
Conservation of momentum applies
Momentum before equals momentum after

Question 9

Uniform Magnetic Field

Answer 9

An area where a force acts on charged particles and the force is the same at all points

Question 10

Alpha particles directed at gold foil experiment

Answer 10

Most particles went straight through
Some deflected
Very few deflect at very large angles
Atom mainly empty space
Charge concentrated at centre
Dense nucleus

Question 11

How does magnetic field induce EMF?

Answer 11

Magnetic flux
Magnet vibrates
Flux through coil changes
EMF induced

Question 12

EMF definition

Answer 12

The energy provided by a cell per unit charge