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WBJEE Magnetism — practice questions — page 4

Explore 109 free Magnetism questions in WBJEE 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 91–109 of 109.

The current carrying conductorRead the answer and worked solution →Charge in a uniform fieldRead the answer and worked solution →What the cyclotron frequency ignoresRead the answer and worked solution →The cyclotron machineRead the answer and worked solution →Formula to what it describesRead the answer and worked solution →The Biot-Savart lawRead the answer and worked solution →Using Biot-SavartRead the answer and worked solution →Field of a circular coilRead the answer and worked solution →Odd one out: magnetismRead the answer and worked solution →Depends on speed or notRead the answer and worked solution →True of the magnetic forceRead the answer and worked solution →Symbol to quantityRead the answer and worked solution →Which is largerRead the answer and worked solution →Field and force directionsRead the answer and worked solution →Currents make fieldsRead the answer and worked solution →Count and computeRead the answer and worked solution →Odd one out: what a current doesRead the answer and worked solution →Zero work, changing directionRead the answer and worked solution →Moving charges, mixed checkRead the answer and worked solution →

Worked practice questions

The current carrying conductor

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Questions
  1. Statement is true
    Yes
    Statement
    A straight conductor carrying a steady current feels a force in a uniform field.
  2. Statement is true
    Yes
    Statement
    The direction of l is set by the direction of the current.
  3. Statement is true
    Yes
    Statement
    The force is I l cross B.
  4. Statement is true
    No
    Statement
    A conductor with no current still feels this force.
Instructions
Tap True or False for each statement.
_Source: syllabus Physics Part 1, Ch 4 'Moving Charges and Magnetism' (leph104)_

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Charge in a uniform field

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Questions
  1. Question
    In a uniform B a charge executes a
    Choices
    1. Circular orbit
    2. Straight line
    3. Parabola
    Correct choice
    Circular orbit
  2. Question
    That orbit lies in a plane
    Choices
    1. Along B
    2. Normal to B
    3. At 45 degrees
    Correct choice
    Normal to B
  3. Question
    The frequency of that motion is called the
    Choices
    1. Larmor length
    2. Bohr rate
    3. Cyclotron frequency
    Correct choice
    Cyclotron frequency
  4. Question
    Cyclotron frequency equals
    Choices
    1. qB over 2 pi m
    2. 2 pi m over qB
    3. qBm
    Correct choice
    qB over 2 pi m
Instructions
Tap the chip that answers each prompt.
_Source: syllabus Physics Part 1, Ch 4 'Moving Charges and Magnetism' (leph104)_

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What the cyclotron frequency ignores

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Questions
  1. Statement is true
    Yes
    Statement
    The cyclotron frequency is independent of the particle's speed.
  2. Statement is true
    Yes
    Statement
    It is independent of the orbit radius.
  3. Statement is true
    Yes
    Statement
    It depends on the charge and the field.
  4. Statement is true
    No
    Statement
    A faster particle always has a higher cyclotron frequency.
Instructions
Tap True or False for each statement.
_Source: syllabus Physics Part 1, Ch 4 'Moving Charges and Magnetism' (leph104)_

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