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Karnataka PUC II Moving Charges and Magnetism — practice questions — page 4

Explore 193 free Moving Charges and Magnetism questions in Karnataka PUC II 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 91–120 of 193.

Diamagnetism arises in atoms whose electrons have no net:Read the answer and worked solution →Field lines of a bar magnet differ from an electric dipole's because they:Read the answer and worked solution →Match the magnetism termRead the answer and worked solution →Sort the magnetic materialsRead the answer and worked solution →True or false about magnetsRead the answer and worked solution →Order what happens to domainsRead the answer and worked solution →Complete the magnet ruleRead the answer and worked solution →Name the magnetic classRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →Magnetism and matter bingoRead the answer and worked solution →The current sensitivity of a moving coil galvanometer with N turns, coil area A, magnetic field B, spring constant k isRead the answer and worked solution →What the cyclotron frequency ignoresRead the answer and worked solution →A long straight wire carries $5$ A. The magnetic field $0.10$ m away from the wire is:Read the answer and worked solution →Depends on speed or notRead the answer and worked solution →A proton of mass m, charge e, speed v enters a magnetic field B perpendicular to its velocity. The radius of its circular path isRead the answer and worked solution →A rectangular current loop is placed in a uniform magnetic field. The net force on the loop isRead the answer and worked solution →A 0.5 m wire carrying 2 A is placed perpendicular to a 0.4 T magnetic field. The force on the wire isRead the answer and worked solution →At equilibrium, the deflection ϕ of a moving coil galvanometer with N turns, area A, current I, in a radial magnetic field B and spring constant k satisfiesRead the answer and worked solution →A 0.1 m radius loop carries 5 A. The magnetic field at a point on its axis 0.1 m from the centre is approximately (μ₀ = 4π × 10⁻⁷ T·m/A)Read the answer and worked solution →Symbol to quantityRead the answer and worked solution →Currents make fieldsRead the answer and worked solution →Two long parallel wires carry currents in the same direction. They willRead the answer and worked solution →A positive charge moves with velocity $\vec{v}$ PARALLEL to a uniform magnetic field $\vec{B}$. The magnetic force on it isRead the answer and worked solution →The magnetic field at the CENTRE of a circular current loop of radius $R$ carrying current $I$ isRead the answer and worked solution →A current loop of area $A$ carrying current $I$ has a MAGNETIC MOMENT of magnitudeRead the answer and worked solution →A charged particle moves with velocity v parallel to a uniform magnetic field B. The magnetic force on the particle isRead the answer and worked solution →A circular loop of radius R carries current I. The magnitude of the magnetic field at its centre isRead the answer and worked solution →The angular frequency of a particle of charge q and mass m moving in a cyclotron with magnetic field B isRead the answer and worked solution →The magnetic field inside an ideal long solenoid with n turns per unit length carrying current I isRead the answer and worked solution →In a crossed E and B velocity selector, a charged particle of speed v passes undeflected when v equalsRead the answer and worked solution →

Worked practice questions

Diamagnetism arises in atoms whose electrons have no net:

  1. Kinetic energies
  2. Orbital motions
  3. Magnetic moment
  4. Electric charge
Show answer and solution

Correct answer: C. Magnetic moment

1. Paired electrons cancel each other's contribution. 2. Only an induced response is left. 3. So such atoms carry no net magnetic moment. 4. The answer is magnetic moment. _Source: syllabus Physics, Ch 5 'Magnetism and Matter'_

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Field lines of a bar magnet differ from an electric dipole's because they:

  1. Start on the poles
  2. Stop at infinity
  3. Cross one another
  4. Close on themselves
Show answer and solution

Correct answer: D. Close on themselves

1. Electric lines run from positive charge to negative charge. 2. Magnetic lines have no charge to begin or end on. 3. They close on themselves instead. 4. So the answer is close on themselves. _Source: syllabus Physics, Ch 5 'Magnetism and Matter'_

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Match the magnetism term

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Matching pairs
  1. Left
    Diamagnetic
    Right
    Repelled, field inside is reduced
  2. Left
    Paramagnetic
    Right
    Weakly magnetised by a field
  3. Left
    Ferromagnetic
    Right
    Strongly magnetised by a field
Instructions
Match each term to what it means.
_Source: syllabus Physics, Ch 5 'Magnetism and Matter'_

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More Physics topics

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