Tag: some natural phenomena

Questions Related to some natural phenomena

The layer below the crust is called _______.
physics some natural phenomena seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. mantle

  2. plate

  3. outer core

  4. inner core

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Correct Option: A
Explanation:

The layer below the Earth's crust is known as mantle. This consists of magma.

The Earth's crust is fragmented and each fragment is known as:

physics some natural phenomena seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. a spot

  2. a plate

  3. a valley

  4. none of the above

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Correct Option: B
Explanation:

The Earth's crust is not a huge single piece rather it is in many pieces or fragments. The fragments are called plates.

Storms, cyclones, earthquake, lightning etc. are ................ natural phenomena:

physics some natural phenomena seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. constructive

  2. destructive

  3. simple

  4. complex

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Correct Option: B
Explanation:

Storms, cyclones, earthquakes and lightning are termed as natural calamities. These causes lot of damages to the properties and enviroments. Hence, they are destructive in nature.

Earthquakes are caused mostly due to:

physics some natural phenomena seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. landslide

  2. flood

  3. tsunami

  4. movement of Earth's plates

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Correct Option: D
Explanation:

Due to movement of Earth's plates, most of the earthquakes occur.

Fill in the blank:

Earth's plates are in _______ motion.

physics some natural phenomena seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. circular

  2. vibrational

  3. rotational

  4. continual

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Correct Option: D
Explanation:

Earth's plates or tectonic plates are always in motion. They continuously move and sometimes collide with each other.

On $26^{th} January, 2001$, a major earthquake occured in _____ district of Gujarat.

physics some natural phenomena seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

  1. Uri

  2. Tangdhar

  3. Bhuj

  4. Kachchh

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Correct Option: C
Explanation:

On 26th January, 2001, an earthquake occurred in Bhuj district of Gujarat at a very high frequency on Richter scale.

Which among the following is the best conductor of electricity?

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. Oxygen

  2. Aluminium

  3. Carbon

  4. Wood

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Correct Option: B
Explanation:

Among oxygen, carbon, aluminium and wood, aluminium is a metal while others are non-metals. Metals are good conductors of electricity.

What happens when the lower end of the lightning conductor is not properly buried in the ground?

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. No earthing

  2. Building are protected

  3. Damage building and even life

  4. Both a & c

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Correct Option: D
Explanation:

Earthing is important to protect building from lightning. If proper earthing is not provide than it can damage building and dangerous for life also.

State whether given statement is True/False ?
Lightning conductor is made up of copper.

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. True

  2. False

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Correct Option: A
Explanation:

Copper wires allow electric current to flow without much loss of energy. Hence, copper is a good conductor of heat and electricity. This is why copper wires are used in mains cables in houses and underground. And, a thick copper strip is used for lightning conductors on tall buildings like church spires.

Why earthing is important?

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. To protect us from electrical shocks.

  2. Transfers charge from a charged body to the Earth.

  3. Both A and B.

  4. Neither A nor B.

Show answer
Correct Option: C
Explanation:

Earthing is the process of transferring charges to the Earth. During lightning, if earthing is not proper, we will get electrical shocks if lightning strikes.