Physics Test 72

Result

Physics Test 72

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Weekly Quiz Competition

Question 1
4 / -1

A particle of mass m and charge q moves with a constant velocity v along the positive x direction. It enters a region containing a uniform magnetic field B directed along the negative z direction, extending from x = a to x = b. The minimum value of v required so that the particle can just enter the region x > b is :-

A
q b B/m

B
q( b – a) B/m

C
q a B/m

D
q(b + a) B/2m
Question 2
4 / -1

A particle having charge of 1 C, mass 1 kg and speed 1 m/s enters a uniform magnetic field, having magnetic induction of 1 T, at an angle θ = 30° between velocity vector and magnetic induction. The pitch of its helical path is (in meters)

A
√3π / 2

B
√3π

C
π / 2

D
π