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Science · Physics
Question details

True or False

1 T =1 N/(A m) The SI unit of B field is T, which is called Tesla. 1T =104 G, which is called guass.

2. G, gauss is the SI unit for B field.

3. A charge with a velocity perpendicular to a uniform B field will move in a circular path in a plane perpendicular to the B field. 4. A charge with a velocity perpendicular to a uniform B field will experience a magnetic force of F=qvB

5. For a mass m to maintain a circular motion on an orbit of radius r, the needed centripetal force is mv/r.

6. For a mass m to maintain a circular motion on an orbit of radius r, the needed centripetal force is mv2 /r.

7. For a circular motion of constant speed, the time to finish one circle is T=2πr/v

8. For a circular motion of constant speed, the angular velocity is ω=v/r= 2π/Τ

9. A charge with a velocity at an angle to a uniform B field will move in a helical path.

A. Zero B. Upward. C. Downward. D. North E. South F. Northeast

10. When a positive charge is moving north, and the B field is pointing toward north, the magnetic force will be _____________ 11. When a positive charge is moving south, and the B field is pointing toward north, the magnetic force will be _____________ 12. When a positive charge is moving east and the B field is pointing toward north, the magnetic force will be _____________ 13. When a negative charge is moving east and the B field is pointing toward north, the magnetic force will be _____________ 14. When a positive charge is moving west and the B field is pointing toward north, the magnetic force will be _____________ 15. When a negative charge is moving west and the B field is pointing toward north, the magnetic force will be _____________