Further Examples of Forces (Leaving Cert Physics): Quizzes

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Further Examples of Forces
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13 questions from this quiz

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What is the motor effect?

Current conductor in magnetic field experiences force

What formula gives force on current-carrying conductor in magnetic field?

F=BIlF = BIl

What determines force direction on current conductor in magnetic field?

Fleming's left-hand rule

Which coil sides experience force when in magnetic field?

Sides cutting across field lines

What is essential for continuous DC motor rotation?

Split-ring commutator

What happens without split-ring commutator in DC motor?

Coil oscillates back and forth

What formula gives force on moving charge in magnetic field?

F=BqvF = Bqv

How does magnetic force affect moving charged particle's motion?

Changes direction but not speed

When is force on moving charge in magnetic field zero?

Moving parallel to field lines

What formula gives radius of charged particle's circular path?

r=mvBqr = \frac{mv}{Bq}

How does stronger magnetic field affect circular path radius?

Smaller radius (tighter path)

What happens to parallel currents in same direction?

Wires attract each other

Which application uses magnetic force on moving charges?

Cathode ray tubes

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