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NPCIL Trainee Magnetism — practice questions

Explore 18 free Magnetism questions in NPCIL Trainee Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Magnetism questions and exercises with answers

Showing questions 1–18 of 18.

NEET · Physics · Magnetic Formula ↔ QuantityRead the answer and worked solution →NEET · Physics · Right-Hand RulesRead the answer and worked solution →Spot the Lie: Magnetism (ISC 12)Read the answer and worked solution →The pole of a freely suspended magnet that orients toward geographic north is called its:Read the answer and worked solution →What happens when the north poles of two different bar magnets are brought close together?Read the answer and worked solution →What is the approximate Curie temperature of iron?Read the answer and worked solution →In an unmagnetized piece of iron, how are the microscopic magnetic domains arranged?Read the answer and worked solution →A device that converts mechanical energy into electrical energy is called a:Read the answer and worked solution →What does an electric motor do?Read the answer and worked solution →In a transformer, the coil across which the input voltage is applied is called the:Read the answer and worked solution →A step-up transformer must increase the voltage fivefold. What must be the ratio of secondary coil turns to primary coil turns?Read the answer and worked solution →The power lost as heat in a transmission wire, due to its resistance, is proportional to:Read the answer and worked solution →In 1831, which two scientists independently demonstrated that a changing magnetic field can produce an electric current?Read the answer and worked solution →Match each magnetism termRead the answer and worked solution →True or false: magnetismRead the answer and worked solution →Tap what magnetism does and does not haveRead the answer and worked solution →Stop on the right magnetism termRead the answer and worked solution →Complete the magnetism rulesRead the answer and worked solution →

Worked practice questions

NEET · Physics · Magnetic Formula ↔ Quantity

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Matching pairs
  1. Left
    F = BIL sin θ
    Right
    Force on current-carrying wire
  2. Left
    F = qv B sin θ
    Right
    Force on a moving charge
  3. Left
    B = μ₀ I / (2πr)
    Right
    Field around long straight wire
  4. Left
    B = μ₀ n I
    Right
    Field inside a long solenoid
  5. Left
    τ = M B sin θ
    Right
    Torque on a magnetic dipole
  6. Left
    Φ = B · A
    Right
    Magnetic flux
Instructions
Match each formula to the physical quantity it expresses.

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NEET · Physics · Right-Hand Rules

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Matching pairs
  1. A
    Curl of fingers — direction of B around a wire
    B
    Right-hand grip rule
  2. A
    Thumb along v, fingers along B
    B
    Force on a moving + charge: F = qv×B
  3. A
    Curl of fingers along current loop
    B
    Direction of magnetic moment
  4. A
    Palm push, thumb along F
    B
    Fleming's left-hand rule (motor)
  5. A
    Index = motion, middle = field, thumb = current
    B
    Fleming's right-hand rule (generator)
  6. A
    Induced EMF opposes the change
    B
    Lenz's law
Instructions
Flip cards to match each hand-rule cue to its name.

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Spot the Lie: Magnetism (ISC 12)

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Questions
  1. False statement
    A magnetic field exerts force on a stationary charge.
    Statements
    1. Magnetic field lines form closed loops.
    2. Like magnetic poles repel each other.
    3. A magnetic field exerts force on a stationary charge.
  2. False statement
    Magnetic monopoles are common in nature.
    Statements
    1. Magnetic monopoles are common in nature.
    2. A current-carrying solenoid behaves like a bar magnet.
    3. The SI unit of magnetic flux is the weber.
  3. False statement
    The unit of magnetic field strength is the volt.
    Statements
    1. Force on a moving charge is F = qv x B.
    2. The unit of magnetic field strength is the volt.
    3. Earth's magnetic field has a horizontal component.
Instructions
Two statements are true, one is a lie. Tap the lie.

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