DAV Class 6 Science Solution Chapter 11 Electric Currents and Circuits
DAV School Books Class 6 Science Solution Chapter 11 Electric Currents and Circuits all Question Answer. DAV Class 6 11th Chapter Electric Currents and Circuits full Chapter explanation by expert teacher.
DAV School Books Class 6 Science Solution Chapter 11 Electric Currents and Circuits:
A.) Fill in the blanks.
Answer: (1) Filament.
Answer: (2) two.
Answer: (3) current.
Answer: (4) electric switch.
Answer: (5) conductors.
Answer: (6) do not.
B.) Write True or False for the following statements.
Answer: (1) True.
Answer: (2) False.
Answer: (3) True.
Answer: (4) True.
Answer: (5) False.
C.) Tick (✓) the correct option.
1.) The thin metal wire inside a electric bulb, is known as _____.
Answer: (c) Filament.
2.) When an electric current starts flowing in an electric bulb, it starts emitting light because it’s ______.
Answer: (c) filament gets heated up and then starts emitting light.A
3.) The basic electric circuit needs to have ______.
Answer: (d) a source of electric current, a few conducting wires as well as an electric switch.
4.) The electric bulb, in the circuit shown here, would glow when ______.
Answer: (d) both switches 1 and 2 are in their ‘ON’ positions.
(D) Answer the following questions in brief.
(1) State the function of the metallic strips used in a torch?
Answer:- Function of Metallic strips used in a torch is to flow electricity when the switch is on.
(3) Write the meaning of the term ‘electric circuit’?
Answer:- An electric circuit is a complete path through current flow.
(4) State the role of an electric switch in an electric circuit.
Answer:- To start and stop the flow of electric current electric switches are useful.
(5) Tools, like screw drivers and pliers, used by electricians, have handles made up of, (or covered with) plastic, rubber or wood. Why?
Answer:- Plastic, rubber and wood prevent electricians from electric shock because they are bad conductors of electricity and not allowed to pass current through them.
(6) Why should we always dry our hands before touching an electric appliance, or a switch?
Answer:- Ordinary water is a good conductor of electricity and we may get an electric shock that’s why we should always dry our hands before touching electric switch
(E) Answer the following questions.
(1) Write in brief, the working of an electric torch.
Answer:- The flow of electric current starts when we press the switch of an electric torch. Electric current starts flowing from electric cells to the electric bulb which heats up the filament of the bulb and then lights up.
(2) A student, while performing an experiment in the science laboratory, connected an electric bulb to an electric cell through an electric switch. He noticed that the bulb did not glow when the electric switch was set in its ON position. Mention ‘any two reasons’ for this observation.
Answer: The bulb did not glow because of these two reasons –
(1) The bulb may be fused.
(2) The connection is loose
(3) Separate out the devices, listed below, into categories that usually work with (i) either batteries or mains (ii) batteries only (iii) mains only.
kettle, iron press, calculator, toaster, mobile phone, washing machine, radio, transistor, computer, microwave oven.
Answer:
- Either batteries or mains – computers
- Batteries only – calculator, mobile, radio, transistor.
- Mains only – iron press, kettle, toaster, microwave, washing machine
(5) Distinguish between the terms conductors and insulators of electricity. Give two examples of each type.
Answer: Differences between Conductors and insulators are as follows –
- Conductors are the materials which allow electricity to pass through them easily. Example – silver, copper, aluminium.
- Insulators materials which do not allow electricity pass through them Examples – plastic, wood, rubber.
Value based questions
Q.) The science teacher, on entering the class, observed that Ritika was looking quite upset. When she asked her the reason, Ritika told her that she had forgotten her raincoat in the bus. The teacher consoled her and advised her to be careful and particular about her belongings. She also told her not to get too upset and stay positive in her thoughts. She told her that positive thoughts light up our life in much the same way as an electric current lights up the bulb through which it flows.
(1) Identify the values conveyed by the teacher to Ritika.
Answer:- Polite, kind, helpful are the values conveyed by the teacher to Ritika.
For more updates, follow our netexplanations home page
Good