PHYSICS-IAL..JAN EXAMS..HELP pls..MAGNETIC FIELDS

Watch
MARYAM1234567
Badges: 13
Rep:
?
#1
Report Thread starter 2 years ago
#1
https://pmt.physicsandmathstutor.com...%20A-level.pdf
Q18 partd)
both the parts
0
reply
username3249896
Badges: 12
Rep:
?
#2
Report 2 years ago
#2
link not working
0
reply
MARYAM1234567
Badges: 13
Rep:
?
#3
Report Thread starter 2 years ago
#3
https://pmt.physicsandmathstutor.com...%20A-level.pdf
0
reply
MARYAM1234567
Badges: 13
Rep:
?
#4
Report Thread starter 2 years ago
#4
(Original post by BobbJo)
link not working
resent
0
reply
username3249896
Badges: 12
Rep:
?
#5
Report 2 years ago
#5
(Original post by MARYAM1234567)
resent
i)
p.d. between anode and cathode same -> accelerating p.d. same -> same kinetic energy -> v is the same as before

p.d. between plates is smaller -> E-field strength b/w plates is smaller -> Force is smaller -> deflection h is smaller

ii)
p.d between plates same, but p.d. between anode and cathode lower
so speed is decreased
so it will spend more time between the plates (t = horizontal length of plate / horizontal velocity)
so y-displacement is higher (s = 1/2at^2)
so more deflection
1
reply
Walnut Prophecy
Badges: 8
Rep:
?
#6
Report 2 years ago
#6
And also in ii) when electrons have lower speeds or the plates are longer, the electrons are going to hit the plate, since in this case all beams will touch the plate, this means the electrons with less speed will definietly defect more than the other electron beams.
2
reply
MARYAM1234567
Badges: 13
Rep:
?
#7
Report Thread starter 2 years ago
#7
(Original post by BobbJo)
i)
p.d. between anode and cathode same -> accelerating p.d. same -> same kinetic energy -> v is the same as before

p.d. between plates is smaller -> E-field strength b/w plates is smaller -> Force is smaller -> deflection h is smaller

ii)
p.d between plates same, but p.d. between anode and cathode lower
so speed is decreased
so it will spend more time between the plates (t = horizontal length of plate / horizontal velocity)
so y-displacement is higher (s = 1/2at^2)
so more deflection
ohhhh okay
got it ...
thanks so much!!
1
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

If you don't put your camera on in online lessons, why is that?

My teacher doesn't want us to (45)
17.24%
No one else does (82)
31.42%
I'm embarrassed about my background (28)
10.73%
I feel self-conscious showing my face (88)
33.72%
We don't use a video platform (5)
1.92%
I don't have a camera (7)
2.68%
Something else (tell us in the thread) (6)
2.3%

Watched Threads

View All