Tag: some natural phenomena

Questions Related to some natural phenomena

When a charged body is brought near an electroscope:

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

  1. the strips of foils opens up.

  2. the strips of foils close.

  3. the strips open and close simultaneously.

  4. the strips neither open nor close.

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Correct Option: A
Explanation:

When a charged body is brought near the top conducting disc of an electroscope, the disc gets induced with charges. These charges run down to the metal strips hanging from the paper clip. Now as both the strips get similar charge, those repel each other and thus open up.

In the process of earthing, how does charges get discharged to Earth?

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

  1. Through some conductor

  2. Directly to the Earth

  3. Through transformer

  4. None of the above

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Correct Option: A
Explanation:

Earthing is important for the protection of human life as well as property. For discharging of charges to the Earth some conductor is required, so that electric charges gets conducted into the Earth.

What will be the nature of charge on the metal paper clip of electroscope when a negatively charged body is brought in contact with it?

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

  1. Positive

  2. Negative

  3. Partially positive

  4. None of the above

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Correct Option: B
Explanation:

The nature of charge will be negative. Here charging is taking place due to contact and metal paper clip will bear the same charge as the charged body. This is charging by conduction.

If a object is charged by contact, it will acquire:

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

  1. opposite charge.

  2. negative charge always.

  3. same charge as the charged body.

  4. positive charge always.

Show answer
Correct Option: C
Explanation:

If an object is charged by contact or conduction, it acquires the same charge as the charged object.

When a foil strips get touched by your hand, it loses charge to the Earth through your body. This process is also referred to as ________.
physics some natural phenomena transfer of charge types of charges and their interaction transfer of charges

  1. earthing

  2. discharging

  3. both A and B

  4. none of the above

Show answer
Correct Option: A
Explanation:

When we touch the strips, the charges get discharged through our body to the Earth and this process is known as earthing.

The process of transferring of charge from a charged object to the Earth is called:

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

  1. lightning

  2. thundering

  3. earthing

  4. all of the above

Show answer
Correct Option: C
Explanation:

When a charged object comes in contact with the Earth, the charges flow into the Earth and the body gets discharged. This process is called earthing.

Spark produced in sky during a thunderstorm are called

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

  1. Lightning

  2. Electric current

  3. Both A and B

  4. None of these

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Correct Option: A

How does lightning occurs between two charges within the cloud?

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. When two negative charges grow large enough then a giant lightning sparks occurs

  2. When positive and negative charges grow large enough then a giant lightning sparks occurs

  3. When two positive charges grow large enough then a giant lightning sparks occurs

  4. None

Show answer
Correct Option: B
Explanation:

Build up of electrostatic charge in the clouds results in lightning. During this event, one region of the cloud is accumulated with positive charge whereas the other region is accumulated with negative charge.Hence when positive and negative charges grow large enough ,the air present being non-conductive no more resists the flow of charges and electric discharge can be seen in the form of giant lightning sparks.

What is the approximate lightning frequency?

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. 1.4 billion flashes per year

  2. 1.4 billion flashes per month

  3. 1.5 billion flashes per year

  4. 1.6 billion flashes per year

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Correct Option: A
Explanation:

It is estimated that lightning strikes 40-50 times every second, i.e., almost 1.4 billion flashes per year.

What is meant by lightning?

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. It is sudden electrostatic discharge during an electrical storm between electrically charged regions of cloud.

  2. It is sudden electrostatic discharge during an electrical storm between non-electrically charged regions of cloud.

  3. It is unsudden electrostatic discharge during an electrical storm between electrically charged regions of cloud.

  4. None of the above

Show answer
Correct Option: A
Explanation:

Lightning occurs when there is a build up of the electrostatic charge in clouds. Regions within the cloud, one builds up a positive whereas other builds up a negative charge.