A proton enters a magnetic field of flux density 5 T with a velocity of 5 × 10^7 ms^-1 at an angle of 30^o with the field. Find the force on the proton.(a) 0.2 × 10^-11 N(b) 2 × 10^-11 N(c) 20 × 10^-11 N(d) 200 × 10^-11 NThe question was posed to me in class test.I want to ask this question from Motion in a Magnetic Field topic in section Moving Charges and Magnetism of Physics – Class 12

A proton enters a magnetic field of flux density 5 T with a velocity o

1.	A proton enters a magnetic field of flux density 5 T with a velocity of 5 × 10^7 ms^-1 at an angle of 30^o with the field. Find the force on the proton.(a) 0.2 × 10^-11 N(b) 2 × 10^-11 N(c) 20 × 10^-11 N(d) 200 × 10^-11 NThe question was posed to me in class test.I want to ask this question from Motion in a Magnetic Field topic in section Moving Charges and Magnetism of Physics – Class 12
Answer» Correct ANSWER is (b) 2 × 10^-11 N For explanation I WOULD say: F = qvB sinθ. F = 1.6 × 10^-19 × 5 × 10^7 × 5 × sin30^o F = 2 × 10^-11 N.

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