Question

CLASS :- 10th
[NCERT BOOK] {QUESTIONS} (PAGE:- 200)
1. What does an electric circuit mean?

Answer:-

2. Define the unit of current.

Answer:-

3. Calculate the number of electrons constituting one coulomb of charge.

Answer:- ​

Answer 1

Need to FinD :-

• What is Electric Circuit ?
• To define the unit of current .
• To calculate the number of electrons constituting one coulomb of charge.

$\bigstar\underline{\underline{\red{\sf Electric \ Circuit :- }}}$

• It is the closed loop in which the current flows .
• It is a network of electrical components like bulb , switch , etc .

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$\bigstar\underline{\underline{\red{\sf Unit \ of \ Current :- }}}$

• The rate of flow of charge is called Electrical Current.
• Its unit is Ampere .

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$\bigstar\underline{\underline{\red{\sf No. \ of \ e^- \ in \ 1C \ charge :- }}}$

• We also know that the charge on a body is the integral multiple of the number of electrons present in it . So that ,

$\sf\longrightarrow Charge ( q) = ne$

• The value of e is 1.6 × 10-¹⁹ C . On substituting , we get ,

$\sf\longrightarrow 1C = n * 1.6 * 10^{-19} C \\\\\\\sf\longrightarrow n = \dfrac{1}{1.6 * 10^{-19} C } \\\\\\\sf\longrightarrow \underline{\underline{\red{\sf n_{(Electrons)}= 6.25 \times 10^{18} }}}$

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