With reference to the development of a thunderstorm, consider the following statements: 1. Air currents move downward while water droplets move upward. 2. Positive charges collect near the upper edges of the clouds. 3. Negative charges accumulate near the upper edges of the clouds. Which of the statements given above is/are correct?

Correct Option The correct option is (b). Explanation Thunderstorms are characterized by the rapid movement of air and moisture, leading to the separation of electric charges within clouds. This phenomenon creates regions of positive and negative charge, eventually resulting in lightning discharges. Statement-wise Analysis - Statement 1 is Incorrect. During the development of a thunderstorm, strong air currents move upward, while water droplets and ice particles move downward. The statement incorrectly reverses these directions. These vigorous opposing movements are responsible for the separation of charges. - Statement 2 is Correct. As a result of the charge separation process, positive charges accumulate near the upper edges of the clouds. - Statement 3 is Incorrect. Negative charges accumulate near the lower edges of the clouds, closer to the ground. The ground itself also accumulates a positive charge. Key Takeaway Charge Separation in Clouds: Upward air currents and downward-moving water droplets cause charge separation, resulting in positive charges at the top of the cloud and negative charges at the bottom.

With reference to the development of a… - NCERT Class 8 Science MCQ

NCERT Class 8 Science — Chapter 3: Some natural phenomena

mcqmedium

With reference to the development of a thunderstorm, consider the following statements:

Air currents move downward while water droplets move upward.
Positive charges collect near the upper edges of the clouds.
Negative charges accumulate near the upper edges of the clouds.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Science - class 8 · Page 5

Options

A1 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is (b).

Explanation

Thunderstorms are characterized by the rapid movement of air and moisture, leading to the separation of electric charges within clouds. This phenomenon creates regions of positive and negative charge, eventually resulting in lightning discharges.

Statement-wise Analysis

Statement 1 is Incorrect. During the development of a thunderstorm, strong air currents move upward, while water droplets and ice particles move downward. The statement incorrectly reverses these directions. These vigorous opposing movements are responsible for the separation of charges.
Statement 2 is Correct. As a result of the charge separation process, positive charges accumulate near the upper edges of the clouds.
Statement 3 is Incorrect. Negative charges accumulate near the lower edges of the clouds, closer to the ground. The ground itself also accumulates a positive charge.

Key Takeaway

Charge Separation in Clouds: Upward air currents and downward-moving water droplets cause charge separation, resulting in positive charges at the top of the cloud and negative charges at the bottom.

Your note

More from Chapter 3: Some natural phenomena

In a simple electroscope, what is the observed effect when the two metallic strips receive the same type of electric charge?

easy

Consider the following statements regarding the charging of objects by rubbing: 1. A plastic refill does not acquire any electric charge when rubbed with polythene. 2. When a plastic comb is rubbed with dry hair, both the comb and the hair get charged. 3. The electrical charges generated by rubbing are static in nature. Which of the statements given above is/are correct?

medium

Which of the following pairs is correctly matched? 1. Electroscope : Device to detect charged bodies 2. Seismograph : Device to measure ocean depth 3. Richter Scale : Scale to measure earthquake magnitude 4. Lightning Conductor : Device to generate electricity Select the correct answer using the code given below:

easy

What is the primary source of seismic waves traveling through the Earth?

easy

Consider the following statements regarding the Earth's plates: 1. The Earth's plates are found in the liquid outer core. 2. The Indian plate is moving. 3. Plate boundaries are safe zones where no earthquakes occur. Which of the statements given above is/are correct?

medium

Keep practising Chapter 3: Some natural phenomena

Work through every question from this NCERT chapter.

Browse all NCERT Class 8 Science chapters