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COMEDK Magnetism & EMI — practice questions — page 2

Explore 53 free Magnetism & EMI questions in COMEDK Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Magnetism & EMI questions and exercises with answers

Showing questions 31–53 of 53.

The Lorentz forceRead the answer and worked solution →Work done by a magnetic forceRead the answer and worked solution →Reading the Lorentz forceRead the answer and worked solution →Force on a current wireRead the answer and worked solution →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 Lorentz force

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Missing parts
  1. Answer
    Lorentz
    Choices
    1. Lorentz
    2. Coulomb
    3. Ampere
  2. Answer
    normal
    Choices
    1. normal
    2. parallel
    3. opposite
Complete the statement
F = q(v cross B + E) is called the {0} force, and the magnetic part is {1} to v.
Instructions
Tap a chip from the bank to fill each blank.
_Source: syllabus Physics Part 1, Ch 4 'Moving Charges and Magnetism' (leph104)_

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Work done by a magnetic force

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Questions
  1. Statement is true
    Yes
    Statement
    The magnetic force q(v cross B) is normal to v.
  2. Statement is true
    Yes
    Statement
    The work done by the magnetic force is zero.
  3. Statement is true
    No
    Statement
    A magnetic force can change a particle's speed.
  4. Statement is true
    Yes
    Statement
    The Lorentz force includes both electric and magnetic parts.
Instructions
Tap True or False for each statement.
_Source: syllabus Physics Part 1, Ch 4 'Moving Charges and Magnetism' (leph104)_

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Reading the Lorentz force

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Questions
  1. Question
    The Lorentz force acts on a charge that is
    Choices
    1. At rest only
    2. Neutral
    3. Moving
    Correct choice
    Moving
  2. Question
    The magnetic part depends on
    Choices
    1. v cross B
    2. v dot B
    3. B alone
    Correct choice
    v cross B
  3. Question
    Work done by the magnetic part is
    Choices
    1. Always positive
    2. Zero
    3. Always negative
    Correct choice
    Zero
  4. Question
    The electric part of the force is
    Choices
    1. qB
    2. qv
    3. qE
    Correct choice
    qE
Instructions
Tap the chip that answers each prompt.
_Source: syllabus Physics Part 1, Ch 4 'Moving Charges and Magnetism' (leph104)_

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