12. Electricity Class 10 Science [LATEST] Solutions Chapter Review in English - CBSE Study
NCERT Solutions for Class 10 Science are carefully prepared according to the latest CBSE syllabus and NCERT textbooks to help students understand every concept clearly. These solutions cover all important 12. Electricity with detailed explanations and step-by-step answers for better exam preparation. Each Chapter Review is explained in simple language so that students can easily grasp the fundamentals and improve their academic performance. The study material is designed to support daily homework, revision practice, and final exam preparation for Class 10 students. With accurate answers, concept clarity, and structured content, these NCERT solutions help learners build confidence and score higher marks in their examinations. Whether you are revising a specific topic or preparing an entire chapter, this resource provides reliable and syllabus-based guidance for complete success in Science.
Class 10 English Medium Science All Chapters:
12. Electricity
1. Chapter Review
Chapter Review:
- A continuous and closed path of an electric current is called an
electric circuit. - In an electric circuit the direction of electric current is taken as opposite to the direction of the flow of electrons, which are negative charges.
- The SI unit of electric charge is coulomb (C).
- An electron possesses a negative charge of 1.6 × 10-19 C.
- The electric current is expressed by a unit called ampere (A).
- The SI unit of electric potential difference is volt (V).
- The potential difference is measured by means of an instrument called the voltmeter. The voltmeter is always connected in parallel across the points between which the potential difference is to be measured.
- Ammeter is an instrument used to measure the electric current in a
circuit.It is always connected in series in a circuit. - The electric current flowingthrough 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..
- A conductor having some appreciable resistance is called a resistor.
- The SI unit of resistivity is Ω m.
- If the electric circuit is purely resistive, that is, a configuration of
resistors only connected to a battery; the source energy continually gets dissipated entirely in the form of heat. This is known as the heating effect of electric current. - The unit of power is watt (W). One watt of power is consumed when 1 A of current flows at a potential difference of 1 V.
- The commercial unit of electrical energy is kilowatt hour (kWh).
1 kW h = 3,600,000 J = 3.6 × 106J.
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