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Electricity — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceElectricity3 Marks
Question
  1. Define the term ‘volt’.
  2. State the relation between work, charge and potential difference for an electric circuit.

Calculate the potential difference between the two terminals of a battery if 100 joules of work is required to transfer 20 coulombs of charge from one terminal of the battery to the other.

✓

Answer

  1. One volt is the potential difference between two points in a current carrying conductor when 1 joule of work is done to move a charge of 1 coulomb from one point to another.
  2. Work = charge x potential difference $(\text{OR }\text{W = Q} \times \text{V})$

$V = \frac{W}{Q}$

$V = \frac{\text{100 J}}{\text{20 C}}$

$\therefore V = \text{5 volt}$

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