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Chapter Analysis
Intermediate22 pages • EnglishQuick Summary
The chapter 'Electricity' in Class 10 Science covers the basics of electric current, circuits, and the concept of potential difference. It explains Ohm's Law, the factors affecting resistance, and the differences between series and parallel circuits. The chapter also dives into practical applications of electricity, including calculating electrical power and energy, and introduces components like resistors and ammeters within circuits.
Key Topics
- •Electric current and its measurement
- •Ohm’s Law
- •Series and parallel circuits
- •Factors affecting resistance
- •Electrical power and energy
- •Use of ammeters and voltmeters
- •Calculation of resistance and current in complex circuits
- •Application of Ohm's Law in real-world scenarios
Learning Objectives
- ✓Understand the basic concept of electric current and circuits.
- ✓Apply Ohm's Law to calculate voltage, current, and resistance in electrical circuits.
- ✓Differentiate between series and parallel circuits and their applications.
- ✓Analyze factors affecting resistance and its significance.
- ✓Calculate electrical power and energy in practical scenarios.
- ✓Use circuit components effectively to measure electrical quantities.
Questions in Chapter
Name a device that helps to maintain a potential difference across a conductor.
Page 175
What is meant by saying that the potential difference between two points is 1 V?
Page 175
How much energy is given to each coulomb of charge passing through a 6 V battery?
Page 175
On what factors does the resistance of a conductor depend?
Page 181
Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Why?
Answer: Current flows more easily through a thick wire due to lower resistance.
Page 181
How is a voltmeter connected in the circuit to measure the potential difference between two points?
Page 193
An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.
Page 193
Additional Practice Questions
What is the unit of electrical resistance and how is it defined?
easyAnswer: The unit of electrical resistance is 'ohm', defined as the resistance between two points in a conductor when a potential difference of one volt is applied, producing a current of one ampere.
Describe the differences between series and parallel circuits.
mediumAnswer: In a series circuit, resistors are arranged in a chain so the current has only one path to follow. In contrast, a parallel circuit has multiple paths or branches. Consequently, in a series circuit, the same current flows through all components, but in a parallel circuit, the total current is the sum of the currents through each path.
What happens to the total resistance and current in a circuit when resistors are connected in series versus parallel?
mediumAnswer: In a series circuit, the total resistance is the sum of individual resistances, leading to less current flow. In a parallel circuit, the total resistance decreases, thus increasing the total current.
Explain the concept of electrical power and how it is calculated.
mediumAnswer: Electrical power is the rate at which electrical energy is consumed in a circuit. It is calculated as the product of voltage and current: P = VI. It is measured in watts (W).
If you have a 12 V battery connected across a 6 ohm resistor, what current flows through the resistor?
easyAnswer: Using Ohm's law, V = IR, the current I = V/R. Thus, I = 12V / 6Ω = 2A.
NCERT Exemplar
AvailablePractice with NCERT Exemplar problems and solutions for this chapter. Exemplar problems are designed to help you master the concepts with advanced-level questions.
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