Science NCERT Exemplar Solutions (Class 6th to 10th)
6th	7th		8th	9th		10th
Science NCERT Exemplar Solutions (Class 11th)
Physics		Chemistry			Biology
Science NCERT Exemplar Solutions (Class 12th)
Physics		Chemistry			Biology

Class 6th Chapters
1. Food: Where Does It Come From?	2. Components Of Food	3. Fibre To Fabric
4. Sorting Materials Into Groups	5. Separation Of Substances	6. Changes Around Us
7. Getting To Know Plants	8. Body Movements	9. The Living Organisms — Characteristics And Habitats
10. Motion And Measurement Of Distances	11. Light, Shadows And Reflections	12. Electricity And Circuits
13. Fun With Magnets	14. Water	15. Air Around Us
16. Garbage In, Garbage Out

Chapter 12 Electricity And Circuits

Multiple Choice Questions

Question 1. Choose from the options a, b, c and d given in Fig. 12.1 the figure which shows the correct direction of current.

Fig. 12.1 showing four figures (a, b, c, d) with diagrams of electric circuits and current direction

(a)

(b)

(c)

(d)

Answer:

Question 2. Choose the incorrect statement.

(a) A switch is the source of electric current in a circuit.

(b) A switch help to complete or break the circuit.

(d) When the switch is open there is an air gap between its terminals.

Answer:

Question 3. In an electric bulb, light is produced due to the glowing of

(a) the glass case of the bulb.

(b) the thin filament.

(d) gases inside glass case of the bulb.

Answer:

Question 4. In the following arrangement shown in Fig. 12.2, the bulb will not glow if the ends A and B are connected with

Fig. 12.2 showing a circuit with bulb, cell, and connection points A and B

(a) A steel spoon

(b) A metal clip

(d) A copper wire

Answer:

Question 5. In the circuit shown in Fig. 12.3, when the switch is moved to ‘ON’ position,

Fig. 12.3 showing a circuit with three bulbs A, B, C and a switch

(a) the bulb A will glow first.

(b) the bulb B will glow first.

(d) all bulbs will glow together.

Answer:

Question 6. Filament of a torch bulb is

(a) a metal case.

(b) metal tip at the centre of the base.

(d) a thin wire.

Answer:

Question 7. Paheli is running short of connecting wires. To complete an electric circuit, she may use a

(a) glass bangle.

(b) thick thread.

(d) steel spoon.

Answer:

Very Short Answer Questions

Question 8. In which of the following circuits A, B and C given in Fig. 12.4, the cell will be used up very rapidly?

Fig. 12.4 showing three different electric circuits A, B, and C

Answer:

Question 9. Fig. 12.5 shows a bulb with its different parts marked as 1, 2, 3, 4 and 5. Which of them label the terminals of the bulb?

Fig. 12.5 showing parts of an electric bulb labeled 1 to 5

Answer:

Short Answer Questions

Question 10. You are provided with a bulb, a cell, a switch and some connecting wires. Draw a diagram to show the connections between them to make the bulb glow.

Answer:

Question 11. Will the bulb glow in the circuit shown in Fig. 12.6? Explain.

Fig. 12.6 showing an electric circuit setup

Answer:

Question 12. An electric bulb is connected to a cell through a switch as shown in Fig. 12.7. When the switch is brought in ‘ON’ position, the bulb does not glow. What could be the possible reason/s for it? Mention any two of them.

Fig. 12.7 showing a circuit with bulb, cell, and switch in ON position

Answer:

Question 13. A torch requires 3 cells. Show the arrangement of the cells, with a diagram, inside the torch so that the bulb glows.

Answer:

Question 14. When the chemicals in the electric cell are used up, the electric cell stops producing electricity. The electric cell is then replaced with a new one. In case of rechargeable batteries (such as the type used in mobile phones, camera and inverters), they are used again and again. How?

Answer:

Question 15. Paheli connected two bulbs to a cell as shown in Fig. 12.8.

Fig. 12.8 showing two bulbs A and B connected to a cell

She found that filament of bulb B is broken. Will the bulb A glow in this circuit? Give reason.

Answer:

Question 16. Why do bulbs have two terminals?

Answer:

Question 17. Which of the following arrangement A, B, C and D given in Fig. 12.9 should not be set up? Explain, why.

Fig. 12.9 showing four different electric circuit arrangements A, B, C, D

Answer:

Question 18. A fused bulb does not glow. Why?

Answer:

Question 19. Paheli wanted to glow a torch bulb using a cell. She could not get connecting wires, instead, she got two strips of aluminium foil. Will she succeed? Explain, how?

Answer:

Long Answer Questions

Question 20. Boojho has a cell and a single piece of connecting wire. Without cutting the wire in two, will he be able to make the bulb glow? Explain with the help of a circuit diagram.

Answer:

Question 21. Fig. 12.10 A and B, show a bulb connected to a cell in two different ways.

Fig. 12.10 showing a bulb connected to a cell in two ways, A and B

(i) What will be the direction of the current through the bulb in both the cases. (Q to P or P to Q)

(ii) Will the bulb glow in both the cases?

(iii) Does the brightness of the glowing bulb depend on the direction of current through it?

Answer:

Question 22. Think of six activities which use electric current. Also name the devices used to perform the activity.

Activity you perform Device

Example : Get light Torch

___________ --------------

Answer:

Question 23. A torch is not functioning, though contact points in the torch are in working condition. What can be the possible reasons for this? Mention any three.

Answer: