BiHAR BOARD CLASS 10 11 12
291Subscribers
No data24 hours
No data7 days
No data30 days
- Subscribers
- Post coverage
- ER - engagement ratio
Data loading in progress...
Subscriber growth rate
Data loading in progress...
Repost from Class 12 11 10 9 CUET CBSE NTSE
Q1: The deflection θ is related to the electric current I in a galvanometer by the relationAnonymous voting
- I ∝ θ
- I ∝ tan θ
- I ∝ sin θ
- I ∝ cos θ
❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️🙏🙏
छठ पर्व करीब है सभी से निवेदन है
ऑनलाइन खरीदारी कम कर उन छोटे दुकानदारों से खरीदारी करे जो आपके भरोसे बाजार,और चौराहे पर बैठे हो। क्यूंकि उनके घर पर्व तभी होगा जब आप उनतक पहुंचेंगे।
छठ पर्व करीब है सभी से निवेदन है
ऑनलाइन खरीदारी कम कर उन छोटे दुकानदारों से खरीदारी करे जो आपके भरोसे बाजार,और चौराहे पर बैठे हो। क्यूंकि उनके घर पर्व तभी होगा जब आप उनतक पहुंचेंगे।
❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️
😭😭😭😭😭😭😭
Commercial and chemical names of common chemicals
Business Name
IUPAC name
Molecular Formula
chalk
calcium carbonate
CaCO₃
grapefruit extract
glucose
C6HO6
alcohol
ethyl
C₂H5OH
caustic potash
Potassium Hydroxide
KOH
eat soda
sodium bicarbonate
NaHCO₃
lime
calcium oxide
CaO
Gypsum
calcium sulfate
CaSO₄.2H₂O
TNT
Tri Nitro Tallinn
C6H₂CH₃(NO₂)₃
washing soda
sodium carbonate
Na₂CO₃
blueberry
Copper sulfate
CuSO₄
Regards
ammonium chloride
NH₄Cl
alum
Potassium aluminum sulfate
K₂SO₄Al₂(SO₄)₃.24H₂O
slaked lime
Calcium Hydroxide
Ca(OH)₂
mand
starch
C6H10O5
laughing gas
nitrous oxide
N₂O
red medicine
Potassium permanganate
KMnO
red vermilion
lead peroxide
Pb₃O₄
dry ice
solid carbon-dioxide
CO₂
saltpeter
Potassium nitrate
KNO
vinegar
dilute solution of acetic acid
CH₃COOH
sweet
Borax
Na₂B₄O7.10H₂O
spirit
Methyl alcohol
CH₃OH
slate
Silica aluminum oxide
Al₂O₃2SiO₂.2H₂O
green kasis
ferric sulfate
Fe₂(SO₄)₃
*वैसे छात्र छात्रा जो 2023 में इंटर या मैट्रिक का फाइनल परीक्षा देंगे उनका परीक्षा फॉर्म भरने का डेट 8 अक्टूबर तक बढ़ गया है ।*
*वैसे छात्र छात्रा जो 2023 में इंटर या मैट्रिक का फाइनल परीक्षा देंगे और यदि उनका ओरिजनल रजिस्ट्रेशन में कुछ गलती है तो उसका सुधार आपके कॉलेज/स्कूल में 8 अक्टूबर तक होगा । साथ ही यह ध्यान रखे कि जिनका रजिस्ट्रेशन में गलती है वे सुधार करवाने के बाद अगले दिन फिर से रजिस्ट्रेशन कॉलेज/स्कूल से ले लीजिए उसके बाद ही परीक्षा फॉर्म भरे ।*
😄😄😄😄😄😄😄😄😄
😘Terminologies in Progressive Wave Motion😍
➖Amplitude
➖Period
➖Wavelength
➖Frequency
➖Wave velocity
➖Phase or phase angle (O)
➖Phase difference
➖Path difference
➖Time difference
🔹Amplitude (A): The amplitude of a wave is the maximum displacement of any particle of the medium from its equilibrium position.
🔹Period (T): Period (T) of a wave is the time taken by any particle of the medium to complete one vibration during a period (T).
🔹Wavelength (λ): Wavelength (λ) is equal to the distance between two consecutive particles of the medium which are in the same state of vibration it is equal to the distance travelled by the wave by its time period (T).
🔹Frequency (f): It is the number of vibrations made per second by any particles of the medium (f = 1/T). Since the frequency of a wave is a characteristic property of the source which is producing the wave motion, hence, the frequency of a wave does not change when a wave travels from one medium to another medium.
🔹Phase or Phase Angle (Φ): It represents the state of vibration of the particle of a medium with respect to its mean position.
🔹Phase Difference Δ(Φ): It represents the different state of vibration of a particle at two different instants (or) any pair of particles at the same instant. ΔΦ = Φ2 – Φ1.
Wave Velocity (v): It is the distance travelled by the wave in one second (v = λ/T). It is determined by the mechanical properties of the medium through which the wave propagates. The velocity of wave motion is measured with respect to the medium, the wave velocity changes when the medium is in motion i.e. speed of sound through air changes when the wind is blowing.
⇒ Check: Sound Waves
There are two velocities associated with a wave. One is the wave velocity and the other one is particle velocity (which is the speed with which the particle of the medium vibrate when the wave passes through the medium).
🔹Path Difference (Δx) or (x): It indicates the distance between two points measured along the direction of propagation of the wave through the medium.
🔹Time Difference (ΔT): It indicates the time taken by the wave to travel from one point to another through the medium.
✍ महत्वपूर्ण फॉर्मूले ( Important Formulas )
1. Work = force × distance
कार्य = बल × दूरी
2. Energy = force × distance
ऊर्जा = बल × दूरी
3. Speed = distance / time
गति = दूरी / समय
4. Velocity= displacement / time
वेग = विस्थापन / समय
5. Electric field = electrical force/charge
विद्युत क्षेत्र= वैद्युत बल/आवेश
6. Force = force/area
प्रतिबल=बल/क्षेत्रफल
7. Volume = length × width × height
आयतन = लंबाई × चौड़ाई × ऊंचाई
8. Mass density = mass/volume
द्रव्यमान घनत्व =द्रव्यमान/आयतन
9. Acceleration =velocity / time
त्वरण = वेग / समय
10. Power = work / time
शक्ति = कार्य / समय
11. Pressure = force / area
दाब =बल/क्षेत्रफल
11. Momentum = mass × velocity
संवेग = द्रव्यमान × वेग
13. Area (A) = Length × Width
क्षेत्रफल ( A ) = लम्बाई × चौड़ाई
14. Force (F) = Mass × Acceleration
बल ( F ) = द्रव्यमान × त्वरण
15. Pressure Energy = Pressure × Volume
दाब ऊर्जा = दाब × आयतन
16. Impulse = force × time
आवेग = बल × समय
17. Linear momentum = mass × velocity
रैखिक संवेग = द्रव्यमान × वेग
18. Kinetic energy = 1/2 mv²
गतिज ऊर्जा = 1/2 mv²
19. Mechanical energy = kinetic energy + potential energy
यांत्रिक ऊर्जा = गतिज ऊर्जा + स्थितिज ऊर्जा
20. Angular momentum = Inertial × Angular velocity
कोणीय संवेग = जड़त्वाघूर्ण × कोणीय वेग