Thunder and Lightning

Q. Which of the following factors affect the capacitance of a capacitor?

1. Area or size of the plate
2. Distance between the plates
3. Shape of the plates
4. Dielectric medium

Q. Define lightning

Q. Why does electric discharge in lightning occur if air is a bad conductor?

1. Air becomes a very good conductor when lightning occurs.
2. The magnitude of accumulated charges in clouds is very high
3. Water particles in the air help in the flow of charges.
4. Winds help in improving the conductivity of air.

Q.

Which of the following processes can take place during a lightning in a thunderstorm?

1. Electric charge accumulation

2. Electric charging

3. All of the above

4. Electric discharge

Q.

Question 11 (iv)

State whether the following statements are True/False.
The process of electric discharge cannot occur between clouds and the earth.

Q.

Identify the reason for the formation of lightning in a thunderstorm.

1. Low presure at high altitude

2. Accumulation of charges in clouds

3. Cyclone

4. Heavy rain

Q.

By which effect does lightning strike happen?

1. Attract the positive charges to the surface, and cause them to accumulate

2. Attract the negative charges to the surface, and cause them to accumulate

3. Both A and B

4. None of these

Q.

How can we decrease the capacitance of a parallel-plate capacitor?

1. Increasing the stored charge in the capacitor

2. Decreasing the stored charge in the capacitor

3. Decreasing the gap between the charged plates

4. Increasing the gap between the charged plates

Q.

Give any three safety measures to be followed during lightning and thunderstorm. [3 MARKS]

Q.

Lightning and thunder occur at the same time and at the same distance from us.Yet, lightning is seen earlier than thunder is heard. Can you explain this? [2 MARKS]

Q.

In the charging by induction method the charge acquired by the neutral object is said to be __________ charge

Q.

Loud sound heard during lightning is called

1. Thunder

2. Shatter

3. Cloud burst

4. Lightning streak

Q. Ground-to-cloud lightning is also known as lightning.

1. sky
2. spider
3. stream

Q.

What causes thunder?

1. Air current moves downwards, water droplets move downwards

2. Air current moves downwards, water droplets move upwards

3. Air current moves upwards, water droplets move downwards

4. Air current moves upwards, water droplets move upwards

Q.

Story of lightning or how does the lightning form ?

Q.

Explain atmospheric electricity. How did Benjamin Franklin prove the lighting strikes dues to atmospheric electricity?

Q.

What are the three main flows of electricity involved during the lightning phenomenon?

1. Cloud to Sky, Cloud to Cloud, Part of a Cloud to another

2. Ground to Cloud, Cloud to Ground, Cloud to Cloud

3. Cloud to Ground, Cloud to a different Cloud, Within parts of the same cloud
4. Cloud to Ground, Cloud to Cloud, Part of a Cloud to air

Q.

Which among the following places is the best place to stay during a thunderstorm?

1. A bridge made of metal

2. Underneath a tall tree

3. A small house

4. Standing in open ground

Q. Why we do not use capacitor made up of metal and capacitance of spherical shell is direct proportion to dielectric constant

Q.

What is the electric field inside a capacitor?

Q. Lightning and thunder takes place in the sky at the same time and at the same distance from us .
Lighting is sews 6 seconds before the thunder is heard . What is the hieght of the cloud ?

Q. The solid water (or hailstones) falling from the upper portion of the cloud carry electrons with them, leaving the upper portion positively charged.

1. True
2. False

Q. The stepped leaders move in steps of approximately .

1. 250 cm
2. 250 m
3. 50 m
4. 50 cm

Q. When stepped leaders approach, the streamers move from ground towards clouds.

1. positive
2. negative
3. neural

Q.

During a thunderstorm, stay away from tall objects as lightning takes the ______ path to the ground.

1. complex

2. longest

3. shortest

4. diagonal

Q. State whether the given statement is True or False :

1. True
2. False

Q.

During lightning, which of the following occurs?

1. There will be a flow of large number of electrons from the cloud to the ground.

2. There will be a flow of protons from the cloud to the ground.

3. No flow happens.

4. Depends upon the charge of cloud.

Q.

Charges imbalance in clouds causes a lightning strike.

1. False

2. True

Q. In the cloud, the solid form of hailstones pull from the liquid droplets.

1. protons
2. heat
3. electrons

Q. How the sound of burstin of a balloon is related to the sound of thunder?