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JEE Advanced Science — practice by topic

Browse 138 questions across 9 Science topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Science topics

Chemical Reactions and Equations (47)Effects of Electric Current (37)Gravitation (21)Periodic Classification of Elements (19)Structure of the Atom (5)Force, Pressure & Fluids (4)Metals and Non-metals (3)Atoms and Molecules (1)Optics (1)

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The notes calculate $\lambda_m^c$ using $\lambda_m^c = \dfrac{0.04 \times 1000}{0.1}$. What value is obtained?Read the answer and worked solution →A heating element in an appliance should not allow current to pass as freely as copper does. Which material from the following is most suitable?Read the answer and worked solution →Which set contains only insulators?Read the answer and worked solution →Which of the following is listed as a resistor material rather than a good conductor?Read the answer and worked solution →

Worked practice questions

The notes calculate $\lambda_m^c$ using $\lambda_m^c = \dfrac{0.04 \times 1000}{0.1}$. What value is obtained?

  1. 40
  2. 400
  3. 4000
  4. 4
Show answer and solution

Correct answer: B. 400

Compute $\lambda_m^c = \dfrac{0.04 \times 1000}{0.1} = \dfrac{40}{0.1} = 400$.

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A heating element in an appliance should not allow current to pass as freely as copper does. Which material from the following is most suitable?

  1. Silver
  2. Copper
  3. Nichrome
  4. Aluminium
Show answer and solution

Correct answer: C. Nichrome

Nichrome is a resistor material with comparatively high electrical resistance so it does not allow current to pass as freely as good conductors such as copper, silver, or aluminium. That makes it suitable where resistance is needed.

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Which set contains only insulators?

  1. Wood, plastic, rubber
  2. Copper, aluminium, silver
  3. Nichrome, manganin, constantan
  4. Iron, rubber, silver
Show answer and solution

Correct answer: A. Wood, plastic, rubber

Insulators are materials with extremely high electrical resistance and do not allow electricity to pass through them. Wood, plastic, and rubber fit this description.

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