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11th grade electricity and magnetism

11th grade (Year 12 in England) · 16 questions · Common Core: NGSS.HS-PS2-5 · England: GCSE Combined Science: Magnetism and electromagnetism (Higher: motor effect)

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  1. Question 1

    Which change would NOT increase the force on a current-carrying wire in a magnetic field?

    • A. increasing the current
    • B. using a stronger magnet
    • C. turning the wire so it is parallel to the field
    • D. having a longer length of wire in the field

  2. Question 2

    A wire 0.4 m long carrying 4 A sits at right angles to a magnetic field of 0.1 T. What is the force on the wire, in N?

    AnswerN

  3. Question 3

    A 0.2 m wire carrying 5 A at right angles to a magnetic field feels a force of 0.5 N. What is the magnetic flux density, in T? (Give 2 decimal places.)

    AnswerT

  4. Question 4

    Which change would NOT increase the force on a current-carrying wire in a magnetic field?

    • A. increasing the current
    • B. using a stronger magnet
    • C. turning the wire so it is parallel to the field
    • D. having a longer length of wire in the field

  5. Question 5

    A wire 0.2 m long carrying 5 A sits at right angles to a magnetic field of 0.25 T. What is the force on the wire, in N?

    AnswerN

  6. Question 6

    A 0.2 m wire carrying 2 A at right angles to a magnetic field feels a force of 0.6 N. What is the magnetic flux density, in T? (Give 2 decimal places.)

    AnswerT

  7. Question 7

    In Fleming's left-hand rule, what do the first finger, second finger and thumb represent?

    • A. motion, current, field
    • B. field, current, motion (force)
    • C. voltage, resistance, power
    • D. current, field, motion

  8. Question 8

    A wire 0.1 m long carrying 5 A sits at right angles to a magnetic field of 1.5 T. What is the force on the wire, in N?

    AnswerN

  9. Question 9

    A 0.5 m wire carrying 4 A at right angles to a magnetic field feels a force of 0.1 N. What is the magnetic flux density, in T? (Give 2 decimal places.)

    AnswerT

  10. Question 10

    In Fleming's left-hand rule, what do the first finger, second finger and thumb represent?

    • A. field, current, motion (force)
    • B. voltage, resistance, power
    • C. motion, current, field
    • D. current, field, motion

  11. Question 11

    A wire 0.4 m long carrying 2 A sits at right angles to a magnetic field of 0.1 T. What is the force on the wire, in N?

    AnswerN

  12. Question 12

    A 0.2 m wire carrying 4 A at right angles to a magnetic field feels a force of 0.3 N. What is the magnetic flux density, in T? (Give 2 decimal places.)

    AnswerT

  13. Question 13

    Electric car motors and loudspeakers both rely on which effect?

    • A. static electricity
    • B. the motor effect: a force on a current in a magnetic field
    • C. the greenhouse effect
    • D. the photoelectric effect

  14. Question 14

    A wire 0.1 m long carrying 10 A sits at right angles to a magnetic field of 0.25 T. What is the force on the wire, in N?

    AnswerN

  15. Question 15

    A 0.2 m wire carrying 5 A at right angles to a magnetic field feels a force of 0.3 N. What is the magnetic flux density, in T? (Give 2 decimal places.)

    AnswerT

  16. Question 16

    In Fleming's left-hand rule, what do the first finger, second finger and thumb represent?

    • A. voltage, resistance, power
    • B. motion, current, field
    • C. current, field, motion
    • D. field, current, motion (force)

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Answer key: 11th grade electricity and magnetism

  1. 1. C. turning the wire so it is parallel to the field

  2. 2. 0.16 N

  3. 3. 0.5 T

  4. 4. C. turning the wire so it is parallel to the field

  5. 5. 0.25 N

  6. 6. 1.5 T

  7. 7. B. field, current, motion (force)

  8. 8. 0.75 N

  9. 9. 0.05 T

  10. 10. A. field, current, motion (force)

  11. 11. 0.08 N

  12. 12. 0.38 T

  13. 13. B. the motor effect: a force on a current in a magnetic field

  14. 14. 0.25 N

  15. 15. 0.3 T

  16. 16. D. field, current, motion (force)