Tag: transfer of charge

Questions Related to transfer of charge

Which of the following cannot be charged easily by friction?

physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

  1. A plastic scale

  2. A copper rod

  3. An inflated balloon

  4. A woollen cloth

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Correct Option: B
Explanation:

Copper rod cannot be charged easily by friction because it is a conductor. Only non-conducting materials can be charged easily by friction.

When a glass rod is rubbed with a piece of silk cloth the rod:

physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

  1. and the cloth both acquire positive charge.

  2. becomes positively charged while the cloth has a negative charge.

  3. and the cloth both acquire negative charge.

  4. becomes negatively charged while the cloth has a positive charge.

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Correct Option: B
Explanation:
The two objects charged by friction gets oppositely charged. 
Charge acquired by the glass rod is positive and charge acquired by the cloth is negative. 

What is the frictional order of the following materials on rubbing:

ebonite, glass rod, wool, plastic

physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

  1. Wool, glass rod, ebonite, plastic

  2. Glass rod, wool, plastic, ebonite

  3. Wool, glass rod, plastic, ebonite

  4. Glass rod, wool, ebonite, plastic

Show answer
Correct Option: D
Explanation:

When any of these materials are rubbed together, the one in higher order gets positive charge (+) and the one in the lower order gets negative charge (-). The correct frictional order is: glass, wool, ebonite and plastic.

What kind of electric charge is acquired on a glass rod when it is rubbed with silk cloth?

physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

  1. Positive charge

  2. Negative charge

  3. Partially positive charge

  4. Partially negative charge

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Correct Option: A
Explanation:

By convention, glass acquire higher order than silk as losses electron. So, on rubbing, glass acquires positive charge and silk acquires negative charge.

When a plastic rod is rubbed with the fur, what charge does the plastic rod get?

physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

  1. Positive

  2. Negative

  3. Neutral

  4. None of the above

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Correct Option: B
Explanation:

Plastic comes below fur in the frictional series of electric charges. So, fur will get positive charge and plastic rod will get the negative charge.

When an object is rubbed by another, the objects get charged - one as positive and another as negative. In electrostatic series:

physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

  1. the one being positively charged comes first.

  2. the one being negatively charged comes first.

  3. both the objects come together.

  4. objects appear as per their atomic numbers.

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Correct Option: A
Explanation:

When two bodies are rubbed for charging, the one acquiring positive charge comes first, on a higher position, in electrostatic series. From the series, it may be interpreted that if two objects are rubbed with each other, the one coming higher in the series will acquire positive charge and the other coming lower in the series will acquire negative charge.

State whether the given statement is True or False :

Depending on which material it is rubbed with, most of the objects can acquire both positive and negative charges in different occasions.

physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

  1. True

  2. False

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Correct Option: B
Explanation:

For most of the materials, if those are rubbed with materials occurring higher in electrostatic series, will acquire negative charge. And if those materials are rubbed with materials occurring lower in electrostatic series, will acquire positive charge. Dry human skin, occurring at top of the electrostatic series will always acquire positive charge. Teflon, occurring at the bottom of the electrostatic series will always acquire negative charge.

If we rub our dry forearm with a silk cloth, the hairs on the forearm will stand straight. This is because:

physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

  1. of the attraction force between the hairs and the cloth.

  2. of the charge acquired to the forearm due to rubbing.

  3. of the magnetic field created due to rubbing.

  4. none of the above.

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Correct Option: B
Explanation:

When the forearm is rubbed with a cloth of silk, the dry forearm acquires positive charge. So, all the hairs there acquire same positive charge and repel each other. Thus the hairs stand straight after rubbing.

The electrical charges generated by rubbing are:

physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

  1. dynamic

  2. static

  3. neutral

  4. none of the above

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Correct Option: B
Explanation:

Static charges are generated by rubbing or friction.

What happens when charged glass rod is brought near a charged plastic straw when rubbed with silk?

physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

  1. Repulsion is observed.

  2. Attraction is observed.

  3. No reaction is observed.

  4. None of the above is observed.

Show answer
Correct Option: B
Explanation:

When rubbed with silk, glass and plastic acquire opposite charges. So, the glass rod and the plastic straw, after being rubbed by silk, will attract each other.