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For a cell of emf 2 V, a balance is obtained for 50 cm of the potentiometer wire. If the cell is shunted by a 2 n resistor and the balance is obtained across 40 cm of the wire, then the internal resistance of the cell is:
Using the meter bridge formula: R/S = L/100 - L Given R = 2Ω and L = 40 cm: 2/S = 40/60 S = 2 × 60/40 = 3Ω Answer: (b) 0.5 Ω For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-3/
Using the meter bridge formula:
R/S = L/100 – L
Given R = 2Ω and
L = 40 cm:
2/S = 40/60
S = 2 × 60/40 = 3Ω
Answer: (b) 0.5 Ω
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-3/
Observe historical portraits and modern portraits. What artistic differences can you identify?
Historical portraits, such as Renaissance paintings, emphasize realism, fine details and status representation. Subjects wear elaborate clothing, with precise lighting and backgrounds. Modern portraits, however, explore abstract and digital forms, using bold colors and varied techniques. ContemporarRead more
Historical portraits, such as Renaissance paintings, emphasize realism, fine details and status representation. Subjects wear elaborate clothing, with precise lighting and backgrounds. Modern portraits, however, explore abstract and digital forms, using bold colors and varied techniques. Contemporary artists experiment with mixed media, expressive brushstrokes and minimalistic compositions. The evolution of portraiture reflects changing artistic trends, cultural shifts and technological advancements in artistic representation.
See lessThink about your family members. Sketch two of them, one in their usual role and another in a completely different role. What changes did you make?
Sketch a family member in their real-life profession—such as a teacher in formal attire—then reimagine them in a contrasting role, like an astronaut. Change clothing, props and background to reflect the new profession while keeping their facial features consistent. This exercise explores how visualRead more
Sketch a family member in their real-life profession—such as a teacher in formal attire—then reimagine them in a contrasting role, like an astronaut. Change clothing, props and background to reflect the new profession while keeping their facial features consistent. This exercise explores how visual elements influence perception, showing how attire and setting shape how people are identified in different social and professional contexts.
See lessResearch how self-portraits have evolved over time. Draw yourself in a historical art style of your choice.
Self-portraits transitioned from Renaissance realism, where details were meticulously captured, to impressionist and surrealist interpretations emphasizing emotion over precision. Choose an era—perhaps a Van Gogh-inspired expressive self-portrait or a cubist Picasso-style version of yourself. Use hiRead more
Self-portraits transitioned from Renaissance realism, where details were meticulously captured, to impressionist and surrealist interpretations emphasizing emotion over precision. Choose an era—perhaps a Van Gogh-inspired expressive self-portrait or a cubist Picasso-style version of yourself. Use historical artistic techniques, such as chiaroscuro for Baroque influence or bold abstraction for modern art. This exercise enhances artistic skills while exploring the evolution of self-representation across different art movements.
See lessStudy how different cultures depict people in art. Choose one style and create a portrait in that style.
Explore cultural art styles like African tribal masks, Indian miniature paintings or Byzantine mosaics. Choose one and replicate its characteristics—bold colors, stylized features or specific compositions. For example, ukiyo-e art uses flat color areas and detailed patterns, while Renaissance portraRead more
Explore cultural art styles like African tribal masks, Indian miniature paintings or Byzantine mosaics. Choose one and replicate its characteristics—bold colors, stylized features or specific compositions. For example, ukiyo-e art uses flat color areas and detailed patterns, while Renaissance portraits emphasize realism and light effects. Creating a portrait in a cultural style enhances understanding of artistic heritage and how different societies represent people in art.
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