Tag: transfer of charges

Questions Related to transfer of charges

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. 

When body losses electrons it acquires:

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

  1. positive charge

  2. negative charge

  3. partially positive charge

  4. partially negative charge

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Correct Option: A
Explanation:

When body losses electrons, it becomes electron deficient and acquires positive charge.

When a body gains electrons it acquires

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

  1. positive charge

  2. negative charge

  3. partially positive charge

  4. partially negative charge

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Correct Option: B
Explanation:

When body gains electrons it gets negatively charged.

The device, which can be used to detect whether an object is charged, is:

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

  1. telescope

  2. microscope

  3. electroscope

  4. none of the above

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Correct Option: C
Explanation:

Electroscope is a device that is used for detection and identification of charges on objects.

When two bodies are charged by rubbing they acquire:

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

  1. equal and opposite charge

  2. equal and same charge

  3. negative charge

  4. positive charge

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Correct Option: A
Explanation:

When two bodies are rubbed on one another, they acquire charges equal in amount and opposite in nature.

When two positively charged materials will be placed close together:

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

  1. both will repel each other.

  2. both will become negative.

  3. both will attract each other.

  4. no interaction / change will be observed.

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Correct Option: A
Explanation:

Same charges repel while opposites charges attract each other when placed together.

The objects which acquires small electric charges, when rubbed with each other, are called:

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

  1. electric objects

  2. charged objects

  3. neutral objects

  4. none of the above

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Correct Option: B
Explanation:

In the process of rubbing objects with one another, both acquire small electric charges. These objects are called charged objects.

Rub an empty ball pen refill on a polythene sheet and hold it on top of small pieces of paper. What will be your observation?

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

  1. Pieces of paper are attracted.

  2. Pieces of paper are repelled.

  3. Pieces of paper are neither attracted nor repelled.

  4. Pieces of paper are either attracted or repelled.

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Correct Option: A
Explanation:

When refill is rubbed on polythene it acquires small electric charges. Due to presence of these charges, pieces of paper gets attracted.

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.