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ISC Class 12 Moving Charges and Magnetism — practice questions — page 5

Explore 133 free Moving Charges and Magnetism questions in ISC Class 12 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Moving Charges and Magnetism questions and exercises with answers

Showing questions 121–133 of 133.

Field and force directionsRead the answer and worked solution →Applying a field makes the domains:Read the answer and worked solution →Substances repelled by a magnetic field are:Read the answer and worked solution →A freely suspended bar magnet settles pointing:Read the answer and worked solution →The tip of a magnet pointing to geographic north is its:Read the answer and worked solution →Magnetic field lines of a bar magnet form:Read the answer and worked solution →Materials are classified by which quantity?Read the answer and worked solution →A bismuth bar near a strong magnet on the lab table is:Read the answer and worked solution →NEET · Physics · Magnetic Formula ↔ QuantityRead the answer and worked solution →Work done by a magnetic forceRead the answer and worked solution →Match the magnetism termRead the answer and worked solution →The magnetic force on a charge $q$ moving with velocity $\vec{v}$ in a magnetic field $\vec{B}$ isRead the answer and worked solution →The magnetic field at a distance $r$ from a LONG STRAIGHT wire carrying current $I$ isRead the answer and worked solution →

Worked practice questions

Field and force directions

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Questions
  1. Question
    The magnetic force direction comes from
    Choices
    1. A dot product
    2. A sum
    3. A cross product
    Correct choice
    A cross product
  2. Question
    For F = I l cross B, l points along the
    Choices
    1. Current
    2. Field
    3. Force
    Correct choice
    Current
  3. Question
    A charge moving parallel to B feels
    Choices
    1. Maximum force
    2. No magnetic force
    3. A reversed force
    Correct choice
    No magnetic force
  4. Question
    The orbit plane is normal to
    Choices
    1. E
    2. v only
    3. B
    Correct choice
    B
Instructions
Tap the chip that answers each prompt.
_Source: syllabus Physics Part 1, Ch 4 'Moving Charges and Magnetism' (leph104)_

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Applying a field makes the domains:

  1. Align with it
  2. Shrink to zero
  3. Break into two
  4. Reverse totally
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Correct answer: A. Align with it

1. Domains favouring the field grow at the expense of others. 2. The rest rotate towards the field direction. 3. So the domains align with the applied field. 4. The answer is align with it. _Source: syllabus Physics, Ch 5 'Magnetism and Matter'_

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Substances repelled by a magnetic field are:

  1. Ferromagnetic
  2. Superconductor
  3. Diamagnetic
  4. Paramagnetic
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Correct answer: C. Diamagnetic

1. Most materials are drawn towards a strong field. 2. One class moves the other way instead. 3. Diamagnetic substances are repelled. 4. So the answer is diamagnetic. _Source: syllabus Physics, Ch 5 'Magnetism and Matter'_

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