Lightning : Introduction

Q. Which of the following statements is not true?

1. Lightning and spark from wollen clothing are essentially the same phenomenon.
2. When you rub a plastc scale on your dry hair, it acquires a charge.
3. Charge acquired by a glass rod is negative when it is rubbed with silk.
4. Static charges are called so, because they donot move by themselves.

Q.

Explain with diagram the purpose, construction and working of a lightning conductor. with [5 MARKS]

Q. Who invented the lightning conductor?

1. Benjamin Franklin
2. Thomas Alva Edison
3. Alexander Fleming
4. Graham Bell

Q.

What name is given to the flash of light which occurs in the sky during the rainy season ?

Q.

The electric nature of lightning was established by a scientist named :

(a) Isaac Newton (b) Robert Hooke (c) Benjamin Franklin (d) Thales

Q. Identify the reason of lightning during a thunderstorm.

1. Heavy rain
2. Low pressure
3. Charge accumulation
4. High speed winds

Q.

What are storms? Describe a thunderstorm.

Q.

Name the scientist who showed that lightning is electric in nature.

Q.

How electric charges generated by rubbing are different from the charges that make a bulb glow? [3 MARKS]

Q.

(a) What is lightning? How is lightning produced between clouds in the sky?

(b) Why does lightning usually strike tall buildings?

(c) What damage can be done when lightning strikes on the earth?

Q.

Thunderstorms are often accompanied by rainfall.

1. False

2. True

Q.

Lightning can ever burn up a tree. Lightning contains a tremendous amount of :

(a) heat energy (b) electric energy (c) chemical energy (d) nuclear energy

Q. How can we know that , an object is having a'' positive charge" or " negative charge"??
How ca we measure it ??

Q.

During a thunderstorm which of the following actions might not be a safe practice?

1. Using Telephone having cord

2. Switching on / off electric lights

3. Using a mobile phone

4. None of the above

Q.

Identify the correct option that takes place during a Lightning.

1. Electric discharge

2. Electric charging

3. Electric charge accumulation

4. All of the above

Q.

The process of electric discharge between different clouds causes __________

Q.

A huge electric spark taking place amongst the clouds during the rainy season.

Q.

Explain why, it might be dangerous to raise an umbrella over our head in a thunderstorm.

Q.

The tremendous electric charges in the atmosphere which produce sheet lightning in the clouds are produced by the process of :

(a) friction (b) induction (c) conduction (d) convection

Q. How does a car protect us from lightning ?

Q. Thunderstorm is usually accompanied with

1. earthqake
2. hurricane
3. lightning
4. tornado

Q.

What causes lightning?

Q. We see lightning first and then hear thunder because light travels faster than sound.

1. False
2. True

Q. Lightning occurs due to:

1. Electric discharge
2. Wind
3. Tsunami
4. Rain

Q.

The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella? Explain.

Q.

Lightning is caused due to discharge between _______ charged clouds.

Q.

Sparks due to lightning have same phenomenon as that of the sparks observed when one take off woolen clothes.

Q.

Select the device that can be used to protect a building from lightning.

1. Crescograph

2. Anemometer

3. Lightning Conductor

4. Barometer

Q. Which of the following is the safest position during lightning?

1. Stand on the ground with head downward.
   
2. Go down on your knees.
   
3. Lie flat on the ground with hand and leg stretched.
   
4. Squat low with hands on the knees and head between the hands.
   

Q.

The charge produced on a body which resemble the charges produced on an ebonite rod when rubbed with fur called

1. Negative charges

2. Positive charges

3. Neutral charges

4. None of the above