Electromagnetism & The Motor Effect Quiz
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5 questions, one answer each
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1. What shape does the magnetic field around a long straight current-carrying wire form?
- A. Straight parallel lines
- B. Concentric circles
- C. A uniform field only
- D. Random scattered lines
2. Why is the magnetic field strongest inside a solenoid?
- A. The wire is thicker inside
- B. The fields from individual coils add together
- C. There is no current inside
- D. The field is shielded from outside
3. What is the motor effect? (higher tier)
- A. A magnet losing its field over time
- B. A force experienced by a current-carrying conductor in a magnetic field
- C. The heating effect of a current in a wire
- D. A change in resistance due to temperature
4. Using Fleming's left-hand rule, which finger represents the current? (higher tier)
- A. Thumb
- B. First finger
- C. Second finger
- D. Little finger
5. A wire of length 0.4 m carries a current of 2 A in a magnetic field of flux density 0.5 T, perpendicular to the field. What force does it experience? (higher tier)
- A. 0.4 N
- B. 0.8 N
- C. 1.0 N
- D. 1.6 N