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Physics

12th

grade

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Magnetic Field

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20 questions

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  • 1. Multiple Choice
    3 minutes
    1 pt
    A beam of electrons travels at 6.0×106 m/s through a uniform magnetic field of   6.5×101 T at right angles to the field. How strong is the force acting on each electron? 
    =  6.25×1013 N
    =  −6.25×1013 N
    =  −6.25×1010 N
    =  −6.25×1013 M
  • 2. Multiple Choice
    3 minutes
    1 pt
    A straight wire carrying a 9.0 A current is in a uniform magnetic field oriented at right angles to the wire. When 75 cm of wire is in the field, the force on the wire is 1.2 N. What is the strength of the magnetic field (B)? HINT: F=I.L.B
    = 0.18 N
    = 0.18 T
    = 0.18 Cm
    = 0.18 
  • 3. Multiple Choice
    2 minutes
    1 pt
    A compass behaves as it does because each needle acts as a(n) ___________.
    Magnet
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