Upsc science and technology Mcqs
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📈 Analytical overview of Telegram channel Upsc science and technology Mcqs
Channel Upsc science and technology Mcqs (@upsc_sci_tech_mcq) in the English language segment is an active participant. Currently, the community unites 40 894 subscribers, ranking 4 440 in the Education category and 9 298 in the India region.
📊 Audience metrics and dynamics
Since its creation on невідомо, the project has demonstrated rapid growth, gathering an audience of 40 894 subscribers.
According to the latest data from 09 September, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by -725 over the last 30 days and by -31 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 0.48%. Within the first 24 hours after publication, content typically collects 0.22% reactions from the total number of subscribers.
- Post reach: On average, each post receives 198 views. Within the first day, a publication typically gains 90 views.
- Reactions and interaction: The audience actively supports content: the average number of reactions per post is 1.
- Thematic interests: Content is focused on key topics such as prelim, upsc, cse, topper, statement.
📝 Description and content policy
Channel description not provided.
Thanks to the high frequency of updates (latest data received on 10 September, 2026), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Education category.
40 894
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Which of the following are potential applications of Borophene?
1. Hydrogen storage
2. Flexible electronics
3. Supercapacitors
4. Nanoelectronics
Select the correct answer using the code below:
A. 1 and 2 only
B. 2, 3 and 4 only
C. 1, 3 and 4 only
D. 1, 2, 3 and 4
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Repost from N/a
The correct answer is C) Radio waves (Note: listed as the second 'C' in the options). Explanation: The electromagnetic spectrum is arranged by wavelength, frequency, and energy. Radio waves have the longest wavelengths (ranging from tens of centimetres to tens of kilometres) and the lowest frequencies/energy in the entire spectrum. Wavelength Order (Longest to Shortest): Radio waves (~1 mm to >100 km) \(\rightarrow \) Longest Wavelength Infrared rays (~700 nm to 1 mm) Ultraviolet rays (~10 nm to 400 nm) X-rays (~0.01 nm to 10 nm) \(\rightarrow \) Shortest Wavelength among options. Why Option E is incorrect: Since radio waves strictly hold the position for the longest wavelength among all the listed electromagnetic waves, Option E ("None of the above/More than one of the above") is ruled out.
Repost from N/a
Q2
Which type of electromagnetic radiation has the longest wavelength?
A) Ultraviolet rays
C) Infrared rays
C) Radio waves
D) X-rays
E) None of the above/ More than one of the above
Repost from N/a
The correct answer is B) Surface tension.
Explanation:
Surface tension is the property of a liquid surface that causes it to behave like a stretched elastic membrane.
A liquid always tries to minimize its surface area to achieve a stable, low-energy state.
Mathematically, a sphere has the minimum surface area for a given volume compared to any other geometric shape. Therefore, free liquid drops naturally pull themselves into spherical shapes.
Why other options are incorrect:
A) Viscosity: This is the internal friction or resistance offered by a fluid against its flow (e.g., honey is more viscous than water). It does not determine the shape of a drop.
C) Elasticity: This is the property of solid materials to return to their original shape after a deforming force is removed.
D) Gravitational force: Gravity actually acts against the perfect spherical shape. It flattens larger liquid drops into puddles. Only very small droplets (where surface tension dominates over gravity) or drops in a zero-gravity environment are perfectly spherical.
E) Option E (BPSC Pattern): Since exactly one option (B) is fully correct and explains the phenomenon, "None of the above/More than one of the above" does not apply here.
Repost from N/a
Q1
A liquid drop tends to assume a spherical shape because of which of the following phenomena?
A) Viscosity
B) Surface tension
C) Elasticity
D) Gravitational force
E) Non of the above/ More than one of the above
Repost from CSE EXAM upsc prelims mains CAPF CDS NDA
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Regarding the operational capabilities and technological integration of the e200X aircraft, consider the following:
1. It is driven by a high-voltage EV powertrain and utilizes edge computing with LiDAR, Radar, and visual sensors for urban navigation.
2. Primary commercial rollouts are planned initially for air ambulance and emergency medical services before scaling to urban mass air taxi services.
Which of the statements given above is/are incorrect?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Consider the following statements regarding 'Advanced Air Mobility' (AAM) and eVTOL technology:
1. eVTOL aircraft require long, specialized asphalt runways to generate the necessary lift during transition to forward flight.
2. Vertiports designed for eVTOL operations generally require a smaller physical footprint compared to conventional airports.
3. The e200X incorporates a patented Synergistic Lift aerodynamic wing design, enabling low-speed stability without requiring an intrusive, wide wingspan.
Which of the statements given above is/are correct?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2, and 3
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