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11. Electricity Science class 10 in English Medium ncert book solutions Additional Questions With Solutions
11. Electricity Additional Questions With Solutions – Complete NCERT Book Solutions for Class 10 Science (English Medium). Get all chapter explanations, extra questions, solved examples and additional practice questions for 11. Electricity Additional Questions With Solutions to help you master concepts and score higher.
11. Electricity Science class 10 in English Medium ncert book solutions Additional Questions With Solutions
NCERT Solutions for Class 10 Science play an important role in helping students understand the concepts of the chapter 11. Electricity clearly. This chapter includes the topic Additional Questions With Solutions, which is essential from both academic and examination point of view. The solutions provided here are prepared strictly according to the latest NCERT syllabus and follow the guidelines of CBSE to ensure accuracy and relevance. Each question is explained in a simple and student-friendly manner so that learners can grasp the concepts without confusion. These NCERT Solutions are useful for regular study, homework help, and exam preparation. All textbook questions are solved step by step to improve problem-solving skills and conceptual clarity. Students of Class 10 studying Science can use these solutions to revise important topics, understand difficult questions, and practise effectively before examinations. The chapter 11. Electricity is explained in a structured way, making it easier for students to connect the theory with the topic Additional Questions With Solutions. By studying these updated NCERT Solutions for Class 10 Science, students can build a strong foundation, boost their confidence, and score better marks in school and board exams.
11. Electricity
Additional Questions With Solutions
Chapter-12. Electricity
Q1: What is an electric circuit?
Ans: A continuous and closed path of an electric current is called an electric circuit.
Q2: Name the instrument which measures electric current in a circuit.
Ans: Ammeter.
Q3: In which order, an ammeter is connected in a circuit?
Ans: In series.
Q4: In which direction does the electric current flow in a circuit?
Ans: the electric current flows in the circuit from positive terminal of the cell to negative terminal of the cell.
Q5: Name the device which produces potential difference in a wire?
Ans: Cell or battery.
Q6: What is potential difference?
Ans: The electrons move only if there is a difference of electric pressure in a conducting metallic wire. This difference of electric pressure is called potential difference.
Q7. Two bulbs of 100 W and 25 W are connected in series to 200 V AC mains. Which bulb glows more brightly? Explain your observation.
Solution:
Given:
- Power of first bulb, P₁ = 100 W
- Power of second bulb, P₂ = 25 W
- Supply voltage = 200 V
Using the relation,
R = V2/P
Resistance of the 100 W bulb,
R₁ = 2002/100 = 400 Ω
Resistance of the 25 W bulb,
R₂ = 2002/25 = 1600 Ω
Since the bulbs are connected in series, the same current flows through both bulbs.
The heat (or power) produced in each bulb is given by:
P = I2R
As the 25 W bulb has a much higher resistance (1600 Ω), it dissipates more power in the series circuit and therefore glows more brightly.
Answer: The 25 W bulb glows more brightly because it has higher resistance than the 100 W bulb. Since the same current flows through both bulbs in series, the bulb with greater resistance produces more heat and light.
Q8: Why does the element of a room heater become red hot but the lead wires remain cold?
Ans: The element of a room heater has high resistance. According to jule’s law of heating , increasing in resistance cause increasing in heat. While the device wire has not so highly resistance.
Q9: Calculate the number of electrons constituting one coulomb of charge.
Ans: 6 x1018 electrons.
Q10: State the Ohm’s Law.
Ans: The electric current flowing through a metallic wire is directly proportional to the potential difference V, across its ends provided its temperature remains the same. This is called Ohm’s law.