Class 7 Exam > Class 7 Notes > Class 7 Oxford Science: Chapter Notes, Worksheets & Tests > Worksheets: Electric Current & Its Effects
Electric Current and Its Effects Class 7 Worksheet Science Chapter 10
| Table of contents |
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| Section A: Multiple Choice Questions |
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| Section B: Short Questions |
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| Section C: Fill in the Blanks |
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| Section D: Match the column (In a Table) |
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| Section E: True False |
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Section A: Multiple Choice Questions
Q.1. Which of the following is responsible for the transport of water and minerals in plants?
(a) Xylem
(b) Phloem
(c) Epidermis
(d) Parenchyma
Q.2. Which of the following is NOT a function of blood in animals?
(a) Transport of nutrients
(b) Transport of waste products
(c) Protection against diseases
(d) Production of energy
Q.3. Which of the following statements is true about electric circuits?
(a) A circuit with only one path for the current is called a parallel circuit.
(b) A circuit with more than one path for the current is called a series circuit.
(c) A circuit with no path for the current is called an open circuit.
(d) A circuit with a switch that can turn on or off the current is called a closed circuit.
Q.4. Which of the following is a safety device used in electric circuits to protect against overloading?
(a) Electric motor
(b) Electric switch
(c) Electric fuse
(d) Electric generator
Q.5. Which of the following materials is NOT attracted to a magnet?
(a) Iron
(b) Copper
(c) Nickel
(d) Cobalt
Section B: Short Questions
Q.1. How does the heating effect of electric current help in our daily lives? Give an example.
Q.2. Explain how an electric bell works.
Q.3. What is an electromagnet? How is it different from a permanent magnet?
Q.4. What is magnetic field? How is it related to the flow of electric current?
Q.5. What are the different parts of a circuit diagram? Explain their functions.
Section C: Fill in the Blanks
Q.1. ____________ is the process of movement of substances in plants.
Q.2. The ____________ system carries oxygen and nutrients to all parts of the body in animals.
Q.3. An ____________ is a device that protects an electric circuit from damage caused by excess current.
Q.4. ____________ is the process of generating a magnetic field around a conductor when an electric current flows through it.
Q.5. An ____________ is a device that produces sound when an electric current flows through it.
Section D: Match the column (In a Table)
Section E: True False
Q.1. Xylem transports water and minerals in animals. (True/False)
Q.2. Phloem transports food in animals. (True/False)
Q.3. Heating effect of electric current is used in electric heaters. (True/False)
Q.4. Magnetic effect of electric current is used in MRI machines.
Q.5. Electric bell is an example of an electromagnet.
You can access the solutions to this worksheet here.
The document Electric Current and Its Effects Class 7 Worksheet Science Chapter 10 is a part of the Class 7 Course Class 7 Oxford Science: Chapter Notes, Worksheets & Tests.
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FAQs on Electric Current and Its Effects Class 7 Worksheet Science Chapter 10
| 1. What is electric current and how is it measured? |  |
Ans.Electric current is the flow of electric charge, typically measured in amperes (A). It represents the rate at which charge is flowing through a conductor, and it can be measured using an ammeter.
| 2. What are the effects of electric current? | |
Ans.The effects of electric current include heating, magnetic, and chemical effects. For instance, when current flows through a resistor, it generates heat (heating effect), and it can produce a magnetic field around a conductor (magnetic effect).
| 3. How does an electric circuit work? | |
Ans.An electric circuit works by providing a closed loop through which electric current can flow. It consists of a power source (like a battery), conductors (wires), and a load (like a bulb) that utilizes the current to perform work.
| 4. What safety measures should be taken when working with electric currents? | |
Ans.Safety measures include using insulated tools, avoiding water when handling electrical devices, ensuring circuits are properly grounded, and using circuit breakers or fuses to prevent overloads that could lead to fires.
| 5. What is the difference between AC and DC current? | |
Ans.AC (Alternating Current) is an electric current that periodically reverses direction, while DC (Direct Current) flows in one direction only. AC is commonly used in homes and businesses, while DC is often used in batteries and electronic devices.
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Nov 25, 2024 Last updated |
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