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CUET UG Current Electricity — practice questions — page 2

Explore 36 free Current Electricity questions in CUET UG 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 31–36 of 36.

How many rules did Kirchhoff give for circuit analysis?Read the answer and worked solution →Kirchhoff's junction rule for currents I1, I2 into a junction gives:Read the answer and worked solution →The quantity denoted by sigma, the inverse of resistivity, is:Read the answer and worked solution →Resistance depends on the material and on the conductor's:Read the answer and worked solution →Halving the cross-section area of a conductor makes resistance:Read the answer and worked solution →The resistance inside a cell itself is called its:Read the answer and worked solution →

Worked practice questions

How many rules did Kirchhoff give for circuit analysis?

  1. Six
  2. Ten
  3. Two
  4. Four
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Correct answer: C. Two

1. Circuit analysis needs a rule for junctions and one for loops. 2. Together they let any network be solved. 3. Kirchhoff gave two rules. 4. So the answer is two. _Source: syllabus Physics, Ch 3 'Current Electricity'_

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Kirchhoff's junction rule for currents I1, I2 into a junction gives:

  1. I3 = I1 - I2
  2. I3 = I1 x I2
  3. I3 = I1 / I2
  4. I3 = I1 + I2
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Correct answer: D. I3 = I1 + I2

1. Charge cannot pile up at a junction. 2. So what flows in must flow out. 3. The junction rule says I3 equals I1 plus I2. 4. The answer is I3 = I1 + I2. _Source: syllabus Physics, Ch 3 'Current Electricity'_

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The quantity denoted by sigma, the inverse of resistivity, is:

  1. Conductivity
  2. Capacitance
  3. Conductance
  4. Capacity of
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Correct answer: A. Conductivity

1. Resistivity measures how strongly a material resists flow. 2. Its reciprocal measures how well it conducts. 3. That quantity is the conductivity. 4. So the answer is conductivity. _Source: syllabus Physics, Ch 3 'Current Electricity'_

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