nse the best answer from the given alternatives. How many electrons produce one coulomb charge? i. about $$ 6.24 imes 10^{19} $$ ii. about $$ 6.24 imes 10^{18} $$ b. Which of the following is the characteristic of a series connection of b. resistors? i. The current through different resistors is same ii. The potential difference through the different resistors is same iii. The potential difference across the resistor increases iv. The current through the resistor decreases What is the resistance of an iron that draws a 4 A current when connected to 220 V mains? $$ \begin{array}{ll} ext { i. } 5.5 \Omega & ext { ii. } 55 \Omega \ ext { iii. } 550 \Omega & ext { iv. } 55.5 \Omega \ ext { d. What is the power rating of a rice cooker connected to a } 220 \mathrm{~V} ext { domestic } \ ext { circuit when it carries } 4.1 \mathrm{~A} ext { ? } \ ext { i. } 90.2 \mathrm{~W} & ext { ii. } 53.6 \mathrm{~W} \ ext { iii. } 536 \mathrm{~W} & ext { iv. } 902 \mathrm{~W}\end{array} $$

Question

nse the best answer from the given alternatives. How many electrons produce one coulomb charge? i. about $$ 6.24 	imes 10^{19} $$ ii. about $$ 6.24 	imes 10^{18} $$ b. Which of the following is the characteristic of a series connection of b. resistors? i. The current through different resistors is same ii. The potential difference through the different resistors is same iii. The potential difference across the resistor increases iv. The current through the resistor decreases What is the resistance of an iron that draws a 4 A current when connected to 220 V mains? $$ \begin{array}{ll}	ext { i. } 5.5 \Omega & 	ext { ii. } 55 \Omega \ 	ext { iii. } 550 \Omega & 	ext { iv. } 55.5 \Omega \ 	ext { d. What is the power rating of a rice cooker connected to a } 220 \mathrm{~V} 	ext { domestic } \ 	ext { circuit when it carries } 4.1 \mathrm{~A} 	ext { ? } \ 	ext { i. } 90.2 \mathrm{~W} & 	ext { ii. } 53.6 \mathrm{~W} \ 	ext { iii. } 536 \mathrm{~W} & 	ext { iv. } 902 \mathrm{~W}\end{array} $$

UpStudy AI · Accepted Answer

**a. Number of electrons producing one coulomb charge**

The charge of one electron is approximately  
$$
e \approx 1.602 \times 10^{-19} \text{ C}.
$$

To determine the number of electrons $$ n $$ for a 1 coulomb charge, we use  
$$
n = \frac{1 \text{ C}}{e} \approx \frac{1}{1.602 \times 10^{-19}} \approx 6.24 \times 10^{18}.
$$

The best alternative is **ii. about $$ 6.24 \times 10^{18} $$**.

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**b. Characteristic of a series connection of resistors**

In a series connection, the same current flows through each resistor. Thus, the characteristic is:

- **i. The current through different resistors is same**

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**c. Resistance of an iron drawing 4 A from a 220 V supply**

Using Ohm’s law,  
$$
R = \frac{V}{I} = \frac{220 \text{ V}}{4 \text{ A}} = 55 \Omega.
$$

The correct alternative is **ii. $$55 \Omega$$**.

---

**d. Power rating of a rice cooker on a 220 V circuit drawing 4.1 A**

The power rating is calculated as:  
$$
P = V \times I = 220 \text{ V} \times 4.1 \text{ A} = 902 \text{ W}.
$$

The correct alternative is **iv. $$902 \text{ W}$$**.
**a. Number of electrons producing one coulomb charge:** ii. about $$6.24 \times 10^{18}$$ **b. Characteristic of a series connection of resistors:** i. The current through different resistors is the same **c. Resistance of an iron drawing 4 A from a 220 V supply:** ii. $$55 \Omega$$ **d. Power rating of a rice cooker on a 220 V circuit drawing 4.1 A:** iv. $$902 \text{ W}$$

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