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Questions and Answers
What is the formula for force experienced by a current-carrying conductor in a magnetic field?
What is the formula for force experienced by a current-carrying conductor in a magnetic field?
- F = IlB²
- F = IlB tanθ
- F = IlB sinθ (correct)
- F = IlB cosθ
What is the purpose of an induction coil?
What is the purpose of an induction coil?
- To obtain a high voltage from a low voltage d.c. source (correct)
- To decrease the voltage of an a.c. power supply
- To amplify the strength of a magnetic field
- To increase the current in a circuit
What is the physical quantity that an induction motor uses to rotate a conductor?
What is the physical quantity that an induction motor uses to rotate a conductor?
- Electromotive force
- Varying magnetic field (correct)
- Electric flux
- Current
What is the purpose of a transformer?
What is the purpose of a transformer?
What is the symbol for the number of turns in a solenoid?
What is the symbol for the number of turns in a solenoid?
Who invented the induction motor?
Who invented the induction motor?
What is the formula for the induced emf in a coil with a number of turns N, experiencing a change in magnetic flux Φ over time t?
What is the formula for the induced emf in a coil with a number of turns N, experiencing a change in magnetic flux Φ over time t?
In an induction motor, what is used to rotate a conductor within the magnetic field?
In an induction motor, what is used to rotate a conductor within the magnetic field?
What is the primary function of an induction coil?
What is the primary function of an induction coil?
Which electrical device changes the voltage of alternating current power supplies?
Which electrical device changes the voltage of alternating current power supplies?
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