You are Here: Home >< Physics

# help im being thick watch

1. im stuck on this question its only worth one mark but i really dont get how to do it

three vertical conductors are maintained at voltages of +600v and A
ov at B
+1200V at C

an electron beam enters at a hole in a
show that the minimum speed that an electron must have to reach B is 1.5*10^7 m/s
ive done that but the next part i dont get

find the speed if the electrons when they hit sheet C

thanks
2. (Original post by sarah12345)
im stuck on this question its only worth one mark but i really dont get how to do it

three vertical conductors are maintained at voltages of +600v and A
ov at B
+1200V at C

an electron beam enters at a hole in a
show that the minimum speed that an electron must have to reach B is 1.5*10^7 m/s
ive done that but the next part i dont get

find the speed if the electrons when they hit sheet C

thanks
im reading it.... and my brain is doin nothing. sorry

some1 clever help i think i should know this too
3. (Original post by sarah12345)
im stuck on this question its only worth one mark but i really dont get how to do it

three vertical conductors are maintained at voltages of +600v and A
ov at B
+1200V at C

an electron beam enters at a hole in a
show that the minimum speed that an electron must have to reach B is 1.5*10^7 m/s
ive done that but the next part i dont get

find the speed if the electrons when they hit sheet C

thanks
Wd = 1/2mv^2 = qV
1/2mv^2 = 1.6x10^-19x1200
v^2 = 4.2x10^14
v = 2.1x10^7ms^-1 ??
4. How do u do the first part???
5. s'all gud i dunz it yeaaa....u lowe it

### Related university courses

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: June 13, 2005
The home of Results and Clearing

### 982

people online now

### 1,567,000

students helped last year
Today on TSR

### Took GCSEs this summer?

Fill in our short survey for Amazon vouchers!

### University open days

1. University of Buckingham
Thu, 23 Aug '18
2. University of Glasgow
Tue, 28 Aug '18
3. University of Aberdeen