Question

14. Proton, electron and deuteron enter a region of uniform magnetic field with same momentum at right angles to the field. Which one has a more curved trajectory?​

Answer 1

Answer:

Answer

Correct option is

B

1:

2

:1

R

mv

2

=qvB

For proton, R

p

=

Bq

mv

=

q

p

B

2M

p

E

Similarly for deuteron and α−particle

R

d

=

q

d

B

2M

d

E

and R

α

=

q

α

B

2M

α

E

According to the question

∴R

p

:R

d

:R

α

or

q

p

M

p

:

q

d

M

d

:

q

α

M

α

∴

1

1

:

1

2

:

2

4

or 1:

2

:1.

Answer 2

Electron will have more curved trajectory because as V is same so the magnetic field will be 1/qv

In this case electron's q has the least value so therefore they so more curved trajectory