A test charge 'q' enters a magnetic field "B" which is directed along x-axis. The velocity of test charge is "v" and it makes an angle "theta" with B.
1) What will be the speed of the test charge after 1 second?
2) Which of the foolowing characterstics of the test charge do not change with the time? Assume "theta is not equal to 0.
a. Momentum
b. Acceleration
c. Kinetic Energy
d. None of the above

3) If "theta" = 0, which of the following change with time?
a. Momentum
b. Acceleration
c. Kinetic Energy
d. None of the above

4) If "theta" is neither 0 nor 90, the path of the test charge is ______________.
5) If m be the mass of the charged particle, which enters with the velocity "v" normal to the magnetic field "B", it will revolve with angular speed given by:-
a. qBm
b. (qm)/B
c. (qB)/m
d. B/(qm)