SEBA Class 7 Science Important Chapter 14 Electric Current and Its Effects

SEBA Class 7 Science Important Chapter 14 Electric Current and Its Effects Solutions English Medium As Per New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters SEBA Class 7 General Science Additional Solutions and select need one. SCERT Important Solutions For Class 7 General Science Download PDF. Important Notes for Class 7 Science SCERT.

SEBA Class 7 Science Important Chapter 14 Electric Current and Its Effects

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. Assam SEBA Board Class 7 Science Additional Question Answer are part of All Subject Solutions. Here we have given SCERT Class 7 General Science Important Notes for All Chapters, You can practice these here.

Electric Current and Its Effects

Chapter: 14

IMPORTANT QUESTION ANSWER

A. Very Short Type Questions & Answers:

1. What is a fuse used for?

Ans: A fuse is a safety device used to prevent damage to electrical circuits by melting when the current exceeds a safe limit.

2. Why does the filament of an electric bulb glow?

Ans: The filament of an electric bulb glows because the electric current passing through it heats it up to a high temperature.

3. What is the symbol for an electric cell?

Ans: The symbol for an electric cell consists of a long line (positive terminal) and a shorter, thicker line (negative terminal).

4. How does an electric current behave when passed through a wire?

Ans: When electric current passes through a wire, it generates a magnetic field around it, making the wire behave like a magnet.

5. What is the difference between a battery and a cell?

Ans: A cell is a single unit that generates electrical energy, while a battery is a combination of two or more cells connected in series or parallel.

6. What happens when current exceeds the safe limit in a circuit?

Ans: If the current exceeds the safe limit, it can overheat the wires and potentially cause a fire, which is why fuses or MCBs are used to break the circuit.

7. What is an electromagnet?

Ans: An electromagnet is formed when electric current passes through a wire wound around an iron nail, making the nail magnetic.

8. Why is the use of fluorescent lights or CFLs recommended over electric bulbs?

Ans: Fluorescent lights or CFLs are more energy-efficient and cause less wastage of electricity compared to traditional electric bulbs.

9. What role does a battery play in a circuit?

Ans: A battery provides the necessary electrical energy for the current to flow through the circuit.

10. What is the function of an electric switch in a circuit?

Ans: An electric switch controls the flow of current by either opening or closing the circuit, turning the device on or off.

B. Fill in the Blanks:

1. Light travels in __________.

Ans: Straight lines.

2. The filament of an electric bulb gets heated and produces __________.

Ans: Light and heat.

3. The symbol for an electric cell shows a longer line for the __________ terminal.

Ans: Positive.

4. The __________ effect of electric current can be observed when current passes through a wire and generates a magnetic field around it.

Ans: Magnetic.

5. A __________ is a safety device that protects electrical circuits from excessive current.

Ans: Fuse.