A charged particle q enters a region of uniform magnetic field B (out of the page) and is deflected d after traveling a horizontal distance a. The magnitude of the momentum of the particle is–
A
B
C
Zero
D
Not possible to be determined as it keeps changing
Text Solution
Verified by ExpertsThe correct answer is:
A
AB = 
= h(say)
In Δ OAD
Fig. cos θ = 
… (i)
Now, In Δ ACB sin 
= 
… (ii)
From (i) and (ii)
= 
∴ h 2 = 2Rd R = 
= 
Now, 
= qvB mv = qBR
Momentum = qB × 
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