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Gujarat Board Class 12 (GSEB) Current Electricity — practice questions

Explore 30 free Current Electricity questions in Gujarat Board Class 12 (GSEB) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Current Electricity questions and exercises with answers

Showing questions 1–30 of 30.

In Ohm's law, the constant of proportionality R is called the:Read the answer and worked solution →The SI unit of resistance is the:Read the answer and worked solution →Doubling the length of a conductor does what to its resistance?Read the answer and worked solution →Halving the cross sectional area of a conductor does what to its resistance?Read the answer and worked solution →Current per unit area taken normal to the current is called current:Read the answer and worked solution →Materials are classified as conductors, insulators and:Read the answer and worked solution →The resistivity of a material is found to depend on the:Read the answer and worked solution →Like resistors, cells can be combined together in an electric:Read the answer and worked solution →Resistance depends on the dimensions of a conductor and on its:Read the answer and worked solution →The average time between collisions for an electron is known as the:Read the answer and worked solution →The drift velocity of conduction electrons is directed how, relative to the field?Read the answer and worked solution →Electrons drift in the direction of which kind of potential?Read the answer and worked solution →The drift velocity is superposed over what motion of the electrons?Read the answer and worked solution →Conductivity is described as arising from charge carriers that are:Read the answer and worked solution →How quickly is the electric field established throughout a circuit?Read the answer and worked solution →Kirchhoff's junction rule says currents entering a junction equal those:Read the answer and worked solution →The junction rule follows from the fact that steady currents cause no:Read the answer and worked solution →Kirchhoff's loop rule says the algebraic sum of potential changes round a loop is:Read the answer and worked solution →Why do series and parallel formulae alone not solve every circuit?Read the answer and worked solution →In a balanced Wheatstone bridge, the galvanometer current is:Read the answer and worked solution →The Wheatstone bridge is presented as an application of which rules?Read the answer and worked solution →If a labelled current I turns out negative, the actual current flows:Read the answer and worked solution →Junction rule or loop ruleRead the answer and worked solution →Match the current electricity termRead the answer and worked solution →True or false about currentRead the answer and worked solution →Sort by resistivityRead the answer and worked solution →One word is wrongRead the answer and worked solution →Complete the current electricity factsRead the answer and worked solution →Order what happens on closing a switchRead the answer and worked solution →Current electricity bingoRead the answer and worked solution →

Worked practice questions

In Ohm's law, the constant of proportionality R is called the:

  1. Resistance
  2. Resonance
  3. Reluctance
  4. Remanence
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Correct answer: A. Resistance

1. Ohm's law relates potential difference to current. 2. The ratio between them is a property of the conductor. 3. The constant of proportionality R is called the resistance of the conductor. 4. So the answer is resistance. _Source: syllabus Physics, Ch 3 'Current Electricity'_

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The SI unit of resistance is the:

  1. The farad
  2. The ohm
  3. The volt
  4. The watt
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Correct answer: B. The ohm

1. Resistance has its own named unit. 2. It is named after the physicist who found the law. 3. The SI unit of resistance is ohm. 4. So the answer is ohm. _Source: syllabus Physics, Ch 3 'Current Electricity'_

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Doubling the length of a conductor does what to its resistance?

  1. Doubles it
  2. Halves it
  3. Cancels it
  4. Cubes it
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Correct answer: A. Doubles it

1. Resistance depends on the dimensions of the conductor. 2. A longer path opposes the current more. 3. Doubling the length of a conductor doubles the resistance. 4. So the answer is doubles it. _Source: syllabus Physics, Ch 3 'Current Electricity'_

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More Physics topics

Electric Charges and Fields