……………….. wire is used in the filament of the bulbs.
- ANichrome
- BCopper
- ✓Tungsten
- DNone
Answer: C.
View full solution →Question types
Electricity. question types
115 questions across 9 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
115
Questions
9
Question groups
5
Question types
01
M C Q
25 Q→02Fill in the blank with correct answer.[1 Mark each]
22 Q→03true or false.[1 Mark each]
10 Q→04Assertion & Reason
7 Q→05[1 Mark Questions]
26 Q→06[2 Mark Questions]
10 Q→07Match The Following.
4 Q→08[4 Mark Questions]
5 Q→09[7 marks Questions]
6 Q→Sample Questions
Electricity. questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
A tiny particle which rotates around the nucleus of an atom is ………………..
- Aproton
- ✓electron
- Cneutron
- Dboth a and b
Answer: B.
View full solution →Liquids that conduct electricity are the solutions of ………………..
- Aacids
- Bbases
- Csalts
- ✓all of these
Answer: D.
View full solution →Flow of per unit time is called current ………………..
- ✓charge
- Bproton
- Cneutron
- Dall of these
Answer: A.
View full solution →The terminal which is connected to a positive terminal of a battery is called ……………….
- ✓anode
- Bcathode
- Cneutral
- Dnone
Answer: A.
View full solution →The flow of ……………… per unit time is called current.
A fuse is a strip of alloy wire which is made of lead and tin with a very low ………………
Copper wire offers very little …………….. and does not get heated up quickly.
…………….. is used in extraction and purification of metals.
In series circuit, the current remains …………….. throughout the circuit.
The gold – leaf electroscope was developed by Abraham Bennet.
Protons carry negative charge and the electrons carry positive charge.
Electric charge is measured in coulomb.
Silk cloth has excess of electrons, so it becomes positively charged.
Materials which do not allow electric charges to pass through them easily are called insulator.
Assertion : When both the strips of electroscope is charged with similar charge, they repel each other and become wide open.
Reason : Like charges always repel each other.
Reason : Like charges always repel each other.
- ✓Both assertion and reason are true and the reason is the correct explanation of the assertion.
- BBoth assertion and reason are true, but the reason is not the correct explanation of the assertion.
- CThe assertion is true, but the reason is false.
- DThe assertion is false, but the reason is true.
Answer: A.
View full solution →Assertion : A current carrying wire should be charged.
Reason : The current in a wire is due to flow of free electrons in a definite direction.
Reason : The current in a wire is due to flow of free electrons in a definite direction.
- ABoth assertion and reason are true and the reason is the correct explanation of the assertion.
- BBoth assertion and reason are true, but the reason is not the correct explanation of the assertion.
- CThe assertion is true, but the reason is false.
- ✓The assertion is false, but the reason is true.
Answer: D.
View full solution →Assertion : Insulators do not allow flow of current through them.
Reason : Insulators have no free charge carrier
Reason : Insulators have no free charge carrier
- ✓Both assertion and reason are true and the reason is the correct explanation of the assertion.
- BBoth assertion and reason are true, but the reason is not the correct explanation of the assertion.
- CThe assertion is true, but the reason is false.
- DThe assertion is false, but the reason is true.
Answer: A.
View full solution →Assertion : Parts of car and bicycle are made iron with chromium coating.
Reason : Chromium does not corrode and resist scratches.
Reason : Chromium does not corrode and resist scratches.
- ✓Both assertion and reason are true and the reason is the correct explanation of the assertion.
- BBoth assertion and reason are true, but the reason is not the correct explanation of the assertion.
- CThe assertion is true, but the reason is false.
- DThe assertion is false, but the reason is true.
Answer: A.
View full solution →Assertion : Charges flow from higher potential to the lower potential.
Reason : Current flows mainly due to flow of electrons.
Reason : Current flows mainly due to flow of electrons.
- ABoth assertion and reason are true and the reason is the correct explanation of the assertion.
- ✓Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
- CThe assertion is true, but the reason is false.
- DThe assertion is false, but the reason is true.
Answer: B.
View full solution →The bulb does not glow in the set up show in figure. List the possible reasons.
Identify the charge on the body with a question mark.
Will the bulb glow if the end B is dipped in pure water?
What do you mean by electrical Earthing?
Sometimes lighting may be seen before the thunder is heard. Why?
You might have observed on a dry day that when you touch the screen of a television you get a slight shock. Why does it happen?
During lightning and thunder we should avoid standing in ground and open spaces Why?
During the construction of a building, the lightning conductor was left hanging in the air by mistake will it be effective? Explain.
Give some uses of electroplating.
How charges are produced by friction?
| 1. | Anode | (a) | Conducting solution |
| 2. | Cathode | (b) | Positive terminal |
| 3. | Ions | (c) | Negative terminal |
| 4. | Electrolyte | (d) | Positively or negatively charged |
| 1. | Insulator | (a) | Coulomb |
| 2. | Conductor | (b) | Electric circuit |
| 3. | Closed path | (c) | Copper |
| 4. | Electric charge | (d) | Rubber |
| 1. | Bulb | (a) | Conductor |
| 2. | Electroplating | (b) | Insulator |
| 3. | Pure water | (c) | Heating effect of current |
| 4. | Salt solution | (d) | Chemical effect of current |
Match the following.
| Two similar charges | acquires a positive charge |
| Two dissimilar charges | prevents a circuit from overheating |
| When glass rod is rubbed with silk | repel each other |
| When ebonite rod is rubbed with fur | attract each other |
| Fuse | acquires a negative charge |
Distinguish between series and parallel circuit.
Write a note on.
- Fuse
- Electric irons.
Explain the function of lightning arrestor with a diagram.
Write a note on –
- Charging
- Electrical discharge.
Explain the structure and working of gold-leaf electroscope with a diagram.
Crossword puzzle :
Clue:
Across :
1. Ions having a positive charge formed by the loss of electrons.
2. Chemical compound which conducts electricity when in aqueous state.
5. Atoms that have an electric charge.
7. A piece of metal through which an electric current enters or leaves in a liquid or gas.
Down :
3. A process in which a thin film of metal is deposited on another metal with the help of electricity.
4. A process in which a chemical change especially decomposition of a chemical compound is brought about by passing an electric current through a solution.
6. Ions having a negative charge formed by the gain of electrons.
8. The negative electrode is an electrolytic cell, toward which positively charged particles are attracted.
Clue:
Across :
1. Ions having a positive charge formed by the loss of electrons.
2. Chemical compound which conducts electricity when in aqueous state.
5. Atoms that have an electric charge.
7. A piece of metal through which an electric current enters or leaves in a liquid or gas.
Down :
3. A process in which a thin film of metal is deposited on another metal with the help of electricity.
4. A process in which a chemical change especially decomposition of a chemical compound is brought about by passing an electric current through a solution.
6. Ions having a negative charge formed by the gain of electrons.
8. The negative electrode is an electrolytic cell, toward which positively charged particles are attracted.
What is electroplating? Explain how it is done.
How lightning takes place?
Explain series and parallel circuit.
What is electroscope? Explain how it works.
Generate a Electricity. paper free
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