You are Here: Home >< A-levels

# a-level physics question watch

1. Calculate the kinetic energy, speed and momentum of an electron as it passes through the hole in the anode.
mass of an electron = 9.1 × 10–31 kg
charge of an electron = –1.6 × 10–19 C

The mark scheme just uses is simple equations but how do you get the velocity for the electron?
2. Are you sure a speed is not given , or does it travel at the speed of light?
Kinetic energy=0.5MV^2
E=HF=HC/Y
E=MC^2
E=MGH
finding energy would be the first thing to do or to find wavelength but it seems like your not given enough to use any of these
even the debroglie wavelength wont help you unless you know Wavelength or velocity.
3. (Original post by cero70)
Are you sure a speed is not given , or does it travel at the speed of light?
Kinetic energy=0.5MV^2
E=HF=HC/Y
E=MC^2
E=MGH
finding energy would be the first thing to do or to find wavelength but it seems like your not given enough to use any of these
even the debroglie wavelength wont help you unless you know Wavelength or velocity.
thats it, its also the first part of the question so its not like you can use any previous answers
but thankyou for trying!
4. Is there any other information given (maybe P.D across the region)?

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: February 14, 2017
Today on TSR

### Edexcel C4 Maths Unofficial Markscheme

Find out how you've done here

### 2,099

students online now

Exam discussions

Poll

## All the essentials

### Student life: what to expect

What it's really like going to uni

### Essay expert

Learn to write like a pro with our ultimate essay guide.

### Create a study plan

Get your head around what you need to do and when with the study planner tool.

### Resources by subject

Everything from mind maps to class notes.

### Study tips from A* students

Students who got top grades in their A-levels share their secrets