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2: Motion
3: Fluids
▶ 4: Electric charge and Electric current
5: Magnetism and Electromagnetism
6: Light
7: Heat
8: Sound
9: Universe
10: Matter Around Us
11: Atomic Structure
12: Periodic Classification of Elements
13: Chemical Bonding
14: Acids, Bases and Salts
15: Carbon and its Compounds
16: Applied Chemistry
17: Animal Kingdom
18: Organisation of Tissues
19: Plant Physiology
20: Organ Systems in Animals
21: Nutrition and Health
22: World of Microbes
23: Economic Biology
24: Environmental Science
25: Computer – LibreOffice Impress
![Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 4 - Electric charge and Electric current - Shaalaa.com](/images/science-english-class-9-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 4 - Electric charge and Electric current")
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Solutions for Chapter 4: Electric charge and Electric current
Below listed, you can find solutions for Chapter 4 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science [English] Class 9 TN Board.
Samacheer Kalvi solutions for Science [English] Class 9 TN Board 4 Electric charge and Electric current Exercise [Pages 49 - 50]
Choose the correct answer.
In current electricity, a positive charge refers to ______.
presence of electron
presence of proton
absence of electron
absence of proton
Rubbing of comb with hair
creates electric charge
transfers electric charge
either (a) or (b)
neither (a) nor (b)
Electric field lines ______ from positive charge and ______ in negative charge.
start; start
start; end
start: end
end; end
Potential near a charge is the measure of its ______ to bring a positive charge at that point.
force
abiility
tendency
work
Heating effect of current is called ______
Joule heating
Coulomb heating
Voltage heating
Ampere heating
In an electrolyte the current is due to the flow of ______.
electrons
positive ions
both (a) and (b)
neither (a) nor (b)
Electroplating is an example for ______.
heating effect
chemical effect
flowing effect
magnetic effect
Resistance of a wire depends on, ______.
temperature
geometry
nature of material
all the above
Match the following.
| 1. | Electric charge | a. | ohm |
| 2. | Potential difference | b. | ampere |
| 3. | Electric field | c. | coulomb |
| 4. | Resistance | d. | newton per coulomb |
| 5. | Electric current | e. | volt |
State whether true or false. If false, correct the statement.
Electrically neutral means it is either zero or equal positive and negative charges.
True
False
State whether true or false. If false, correct the statement.
Ammeter is connected in parallel in any electric circuit.
True
False
State whether true or false. If false, correct the statement.
The anode in electrolyte is negative.
True
False
State whether true or false. If false, correct the statement.
Current can produce magnetic field.
True
False
Electrons move from ______ potential to ______ potential.
The direction opposite to the movement of electron is called ______ current.
The e.m.f of a cell is analogues to ______ of a pipe line.
The domestic electricity in India is an ac with a frequency ______ of Hz.
Conceptual question.
A bird sitting on a high power electric line is still safe. How?
Conceptual question.
Does a solar cell always maintain the potential across its terminals constant? Discuss
Conceptual question.
Can electroplating be possible with alternating current?
Answer the following.
On what factors does the electrostatic force between two charges depend?
What are electric lines of force?
Define electric field.
Define electric current and give its unit.
State Ohm’s law.
Name any two appliances which work under the principle of heating effect of current.
How are the home appliances connected in general, in series or parallel. Give reasons.
List the safety features while handling electricity
Exercise.
Rubbing a comb on hair makes the comb get – 0.4C.
- Find which material has lost electron and which one gained it.
- Find how many electrons are transferred in this process.
Exercise.
Calculate the amount of charge that would flow in 2 hours through an element of an electric bulb drawing a current of 2.5 A.
Exercise.
The values of current (I) flowing through a resistor for various potential differences V across the resistor are given below. What is the value of resistor?
| I (ampere) | 0.5 | 1.0 | 2.0 | 3.0 | 4.0 |
| V (volt) | 1.6 | 3.4 | 6.7 | 10.2 | 13.2 |
Solutions for 4: Electric charge and Electric current
Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 4 - Electric charge and Electric current
Shaalaa.com has the Tamil Nadu Board of Secondary Education Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Samacheer Kalvi solutions for Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education 4 (Electric charge and Electric current) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
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Concepts covered in Science [English] Class 9 TN Board chapter 4 Electric charge and Electric current are Electric Charge, Potential and Potential Difference, Electric Current, Direction of the Electric Current - Conventional and Electronic Flow, Electro-motive Force (E.M.F.) of a Cell, Resistance (R), Electric Circuit, Types of Circuits: Series Circuit, Types of Circuits: Parallel Circuit, Symbols and Functions of Various Components of an Electric Circuits, Heating Effect of Electric Current, Effects of Electric Current, Chemical Effects of Electric Current, Magnetic Effect of Electric Current, Types of Current, Dangers of Electricity, Precautions to Be Taken While Using Electricity, Electric Force, Electric Field.
Using Samacheer Kalvi Science [English] Class 9 TN Board solutions Electric charge and Electric current exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Samacheer Kalvi Solutions are essential questions that can be asked in the final exam. Maximum Tamil Nadu Board of Secondary Education Science [English] Class 9 TN Board students prefer Samacheer Kalvi Textbook Solutions to score more in exams.
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