OCR A-level Physics: Electrons, Waves and Protons

What differences are there between e.m.f and p.d?

How would you find how many charge carriers there are in a given amount of charge?

What is current?

State the equation associated with the "mean drift velocity" and state what a high/low value of 'n' would mean.

Name the charge carriers in:
A - a metal
B - an electrolyte

Explain Ohm's law?

State the factors that affect resistance?

Describe the difference between resistance and resistivity.

What is power, its unit and the equations associated with it?

State how you would convert from joules to Kilowatt-hours.

Describe Kirchhoff's laws

In a parallel circuit state the general formula for:

1. Resistance
2. Current
3. P.D

In a series circuit state the general formula for the:
1. Resistance
2. Current
3. P.D

Describe a ______ wave:
1. Longitudinal
2. Transverse
3. Progressive

Explain the difference between Phase and path difference.

State the equations associated with the speed of a wave?

Define intensity and the equation associated with it.

What properties are shared by all Electromagnetic waves?

Describe reflection, refraction and diffraction.

What is polarisation?

Define Interference.

Give the orders of magnitude of the wavelength of a:
-Radio Wave
- Light Wave
- Gamma Wave

State Malus' law and the equation associated with it.

How would you find the refractive index of a material?

Give the equations associated with Snell's law

The angles of incidence and refraction are measured to the:

A - Boundary line
B - Normal line

Explain the term 'total internal reflection', the conditions required for it to occur and the equation associated with finding the 'critical angle'?

State the Principle of superposition?

Explain Coherence.

For constructive and destructive interference to occur the:

1). Path difference must be
2). Phase difference must be