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NEET UG Moving Charges and Magnetism — practice questions — page 4

Explore 180 free Moving Charges and Magnetism questions in NEET UG 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 180.

The force on a charge moving in electric and magnetic fields is named after:Read the answer and worked solution →The magnetic force on a charge depends on its charge, its velocity and the:Read the answer and worked solution →Compared with a positive charge, the force on a negative charge is:Read the answer and worked solution →The magnetic force involves which product of velocity and field?Read the answer and worked solution →To find the force on a current, the rod considered has uniform:Read the answer and worked solution →With carrier density n, area A and length l, the number of carriers is:Read the answer and worked solution →All known magnetic fields are due to moving charges and to intrinsic:Read the answer and worked solution →The law giving the field of a current element is named after Biot and:Read the answer and worked solution →By the Biot-Savart law, the field of a current element is proportional to the:Read the answer and worked solution →The Biot-Savart field falls off with distance as its:Read the answer and worked solution →The Biot-Savart field direction is perpendicular to the plane containing dl and:Read the answer and worked solution →Ampere's circuital law is an alternative way of expressing the law of:Read the answer and worked solution →Ampere's circuital law considers a surface that is:Read the answer and worked solution →Ampere's law is to Biot-Savart law what Gauss's law is to the law of:Read the answer and worked solution →Ampere's circuital law holds for loops that are:Read the answer and worked solution →Ampere's law is easiest to apply in situations of high:Read the answer and worked solution →The two pieces of equipment used to generate magnetic fields are the toroid and the:Read the answer and worked solution →The machine that combines a solenoid and a toroid for high fields is the:Read the answer and worked solution →A toroid is a hollow ring wound closely with many:Read the answer and worked solution →A toroid can be viewed as a solenoid that has been:Read the answer and worked solution →A galvanometer becomes an ammeter by adding a shunt resistance in:Read the answer and worked solution →A galvanometer becomes a voltmeter by adding a large resistance in:Read the answer and worked solution →True or false on moving chargesRead the answer and worked solution →Quick picks on moving chargesRead the answer and worked solution →Match each law to what it doesRead the answer and worked solution →Ammeter or voltmeterRead the answer and worked solution →Solenoid or toroidRead the answer and worked solution →Find the field with Biot-SavartRead the answer and worked solution →Fill the gaps on moving chargesRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →

Worked practice questions

The force on a charge moving in electric and magnetic fields is named after:

  1. Lorentz
  2. Ampere
  3. Oersted
  4. Savart
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Correct answer: A. Lorentz

1. The combined force was written down first by one physicist. 2. He built on the experiments of Ampere and others. 3. It is called the Lorentz force. _Source: syllabus Physics Part I, Chapter 4, Moving Charges and Magnetism._

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The magnetic force on a charge depends on its charge, its velocity and the:

  1. Temperature
  2. Magnetic field
  3. Electric charge
  4. Resting mass
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Correct answer: B. Magnetic field

1. Three quantities enter the magnetic part of the Lorentz force. 2. Two of them belong to the particle itself. 3. The third is the magnetic field B. _Source: syllabus Physics Part I, Chapter 4, Moving Charges and Magnetism._

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Compared with a positive charge, the force on a negative charge is:

  1. Opposite
  2. Identical
  3. Doubled
  4. Absent
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Correct answer: A. Opposite

1. The force is proportional to the charge q. 2. Changing the sign of q reverses the direction. 3. So the force on a negative charge is opposite. _Source: syllabus Physics Part I, Chapter 4, Moving Charges and Magnetism._

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