Tag: lightning safety

Questions Related to lightning safety

Choose the correct statement.

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

  1. 'P' waves are slower than 'S' waves.

  2. Both 'P' and 'S' waves have same speed.

  3. 'S' waves are slower than 'P' waves.

  4. None of the above.

Show answer
Correct Option: C
Explanation:
The P waves and the S waves are the waves that travel throughout the planet. The P waves are the compression waves that apply force in the direction of propagation whereas the S waves are shear waves that make the medium particle move perpendicular to their direction of motion.
The energy is less easily transmitted in the medium in the case of S waves. So, P waves travel faster.

Option $C$ is correct.

How do we record seismic waves?

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

  1. With the help of a seismogram.

  2. With the help of a seismograph.

  3. With the help of a seismocity.

  4. None of the above.

Show answer
Correct Option: B
Explanation:

Seismograph is a device which is used to record and measure seismic waves created by earthquakes.

A seismograph is also known as:

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

  1. seismogram

  2. seismology

  3. seismometer

  4. seismocity

Show answer
Correct Option: C
Explanation:
A seismograph, which measures seismic waves, is also known as a seismometer.

'S' waves are

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

  1. Longitudinal

  2. Electromagnetic

  3. Ultrasonic

  4. Transverse

Show answer
Correct Option: D
Explanation:

The S waves moving through the planet make the medium to move perpendicular to the direction of the propagation of the wave. Therefore. the S waves are regarded as the transverse waves.

Waves produced due to earthquakes are known as :

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

  1. seismic waves

  2. shock waves

  3. infrasonic waves

  4. destructive waves

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Correct Option: A

Waves produced due to the earthquake are known as

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

  1. seismic waves

  2. shock waves

  3. infrasonic waves

  4. Tectonic waves

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Correct Option: A

Fill in the blank:

Seismometers can record motions in ________ directions.

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

  1. one

  2. all

  3. opposite

  4. same

Show answer
Correct Option: B
Explanation:

Seismometer devices are located in $3$ directions and work on principle of inertia to catch the motions in all directions.

The natural phenomenon which we are not yet able to predict accurately is:

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

  1. earthquake

  2. flood

  3. volcanic erruption

  4. thunderstorm

Show answer
Correct Option: A
Explanation:

After knowing causes of the earthquake, it is still not possible to predict when and where the next earthquake may occur.

When did a major Tsunami occur in the Indian ocean?

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

  1. On $26^{th}$ December, $2004$.

  2. On $26^{th}$ July, $2004$.

  3. On $26^{th}$ December, $2001$.

  4. On $26^{th}$ July, $2001$.

Show answer
Correct Option: A
Explanation:

A sudden disturbance under the Indian ocean led to Tsunami through the coastal areas of India on 26th December, 2004.

Fill in the blank:

A sudden shaking or trembling of the Earth, caused by a disturbance deep inside the Earth's crust, is known as ________.

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

  1. tsunami

  2. flood

  3. earthquake

  4. landslides

Show answer
Correct Option: C
Explanation:

An earthquake is a sudden shaking or trembling of the Earth which lasts for a very short time.