Tag: transfer of charge

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

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

  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.
Reveal answer Fill a bubble to check yourself
B Correct answer
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. 
Multiple choice physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of charge

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

ebonite, glass rod, wool, plastic

  1. Wool, glass rod, ebonite, plastic

  2. Glass rod, wool, plastic, ebonite

  3. Wool, glass rod, plastic, ebonite

  4. Glass rod, wool, ebonite, plastic
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. Positive charge

  2. Negative charge

  3. Partially positive charge

  4. Partially negative charge
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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

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

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

  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.
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

Multiple choice physics some natural phenomena types of charges and their interaction transfer of charges charging and discharging transfer of 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.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  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.
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. Repulsion is observed.

  2. Attraction is observed.

  3. No reaction is observed.

  4. None of the above is observed.
Reveal answer Fill a bubble to check yourself
B Correct answer
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.