Lightning : Characteristics

Q. When you walk across a carpet (in wool socks especially) you will transfer electrons from the carpet to your socks. These electrons spread out over the surface of your body, so now you have a net negative charge. Then when you touch the door knob, you ________ from the static electricity you generated.

1. Feel warm
2. Feel cold
3. Feel shock
4. Feel wet

Q. When a glass rod is rubbed with silk the free electrons of glass rod are transferred to silk. But glass is a insulator and insulators do not have free electrons. So how did free electrons from glass rod get transferred to silk if glass rod doesn’t even have free electrons

Q. Who demonstrated that lightning and the spark of clothes are the same phenomena?

1. Benjamin Franklin
2. Franklin D. Roosevelt
3. Isaac Newton
4. Thomas Alva Edison

Q.

When charges do not flow, the electricity is called _____.

Q.

An electric charge in a state of motion produces .

Q.

Lightning generally strikes on high rise buildings.

1. True

2. False

Q.

During lightning, charges can only flow between a cloud and the earth.

1. True

2. False

Q.

The auroras are a result of interactions between the solar wind and the ______.

Q. Transfer of electric charges can take place between two bodies through a conductor.

1. True
2. False

Q. Is it really that dangerous to be under a tree during a thunderstorm?

1. True
2. False

Q. What is the difference between static and current electricity?

Q.

Which of the following are associated with lightning?

1. A loud sound will be heard

2. There will be a flash of bright light

3. All of the above

4. The temperature of the area surrounding the lightning will increase

Q.

Which of the following statements is true with respect to a thunderstorm?

1. There is an accumulation of positive charges near the ground.

2. The ground is neither positively charged nor negatively charged.

3. There is an accumulation of negative charges near the ground.

4. None of the above

Q. The normal movement of electric charges among the Earth's surface, the various layers of the atmosphere, and especially the ionosphere, taken together, are known as :

1. the global atmospheric electrical circuit
2. a current conducting circuit
3. charge cloud
4. none of the above

Q.

What is the reason for the formation of lightning in a thunderstorm?

1. Accumulation of charges in clouds

2. Low presure at high altitude

3. Heavy rain

4. Cyclone

Q.

What is that give the lightning shape?

Q. Which of the following statements is associated with lightning?

1. The temperature of the area surrounding the lightning will increase.
2. A loud sound will be heard.
3. There will be a flash of bright light.
4. All of the above.

Q.

Which of the following are associated with a lightning?

1. The temperature of the area surrounding the lightning will increase.

2. A loud sound will be heard.

3. There will be a flash of bright light.

4. All of the above.

Q. The top of the atmosphere is about 400 kV with respect to the surface of the earth, corresponding to an electric field that decreases with altitude. Near the surface of the earth, the field is about $100V{m}^{-1}$. Still, we do not get an electric shock as we step out of our house into the open house, because (assume the house to be a steel cage so that there is no field inside)

1. There is a potential difference between our body and the ground
2. $100V{m}^{-1}$ is not a high electric field so that we do not feel the shock
3. Our body and the ground forms an equipotential surface
4. The dry atmosphere is not a conductor

Q. The intensity of the atmospheric electric field is, normally,

1. greater in the middle of the day than at morning
2. smaller in the middle of the day than at morning
3. same in the middle of the day as at morning
4. zero in the middle of the day and at morning

Q.

Which of the following statement is true with respect to a thunderstorm?

1. There is an accumulation of positive charges near the ground

2. The ground is neither positively charged nor negatively charged

3. There is an accumulation of negative charges near the ground

4. None of these

Q.

Lightning is an example of___.

1. static charging

2. charging by induction

3. static discharge

4. charging by conduction

Q.

What happens during the development of thunderstorms?

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. Static charges in the atmosphere is generated by

1. induction from the earth's surface
2. conduction between clouds
3. friction of the air upon itself
4. No reason

Q. The intensity of atmospheric electric field is :

1. same in winter as in summer
2. lesser in winter than in summer
3. greater in winter than in summer
4. none of the above

Q.

Define static electricity.

Q. Lightning is formed in unstable atmospheric zones where there is typically a lot of ____ and ______.

1. Heat, moisture
2. Heat, vapour
3. Heat, gas
4. Heat, lava

Q. Electric discharges in the atmosphere is associated with natural phenomena such as :

1. lightning
2. reflecting
3. refracting
4. none of the above

Q. A lightning rocket is a device used to control

1. time and location of a lighting strike.
2. fuel and location of a lighting strike.
3. the lighting of the strom
4. none of the above

Q.

Which of the following statements is true with respect to a thunderstorm?

1. There is an accumulation of positive charges near the ground

2. The ground is neither positively charged nor negatively charged

3. There is an accumulation of negative charges near the ground

4. None of the above