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Home/physics cbse sample paper 2023

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Mayur Arya
Mayur Arya
Asked: December 27, 2023In: Class 10 Science

A carbon compound P has six carbon atoms and twelve hydrogen atoms. (a) Is P a saturated or unsaturated carbon compound. Justify your answer by drawing the structural formula. (b) Describe a test that can be used to determine if compound P is saturated or unsaturated. (c) Name the products that are formed on burning compound P in an excess of air.

Carbon compounds, also known as organic compounds, are molecules containing carbon-hydrogen bonds. They form the basis of life and include diverse substances like carbohydrates, proteins, lipids, and nucleic acids.

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  • 1 1 Answer
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Prasant
Prasant
Asked: December 27, 2023In: Class 10 Science

A helical coil whose length is greater than its diameter is connected to a battery as shown below. (a) How does the magnetic field at point P compare with the magnetic field at point Q? Justify your answer. (b) State one way in which the strength of the magnetic field inside a current carrying helical coil can be changed?

A helical coil whose length is greater than its diameter is connected to a battery as shown below. (a) How does the magnetic field at point P compare with the magnetic field at point Q? Justify your answer. (b) State one way in which the strength of the magnetic field inside a current carrying helical coil can be changed?

A helical coil is a structure formed by winding a flexible material, like a tube or wire, into a spiral shape. It is commonly used in heat exchangers and other fluid systems.

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  • 1 1 Answer
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Srushti
Srushti
Asked: December 27, 2023In: Class 10 Science

A plant X was enclosed in a glass jar with some lizards. A similar plant Y was enclosed in another glass jar but without lizards. Both the jars are kept under the same light conditions for a few hours. Which plant is likely to photosynthesize more and why?

Photosynthesis is the process by which plants, algae, and some bacteria convert sunlight into energy, producing glucose and oxygen from carbon dioxide and water in chloroplasts.

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  • 1 1 Answer
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Rajshree Chatterjee
Rajshree Chatterjee
Asked: December 26, 2023In: Class 10 Science

Sahil performed an experiment to study the inheritance pattern of genes. He crossed tall pea plants (TT) with short pea plants (tt) and obtained all tall plants in F1 generation. a. What will be set of genes present in the F1 generation? B. Give reason why only tall plants are observed in F1 progeny c. When F1 plants were self – pollinated, a total of 800 plants were produced. How many of these would be tall, medium height or short plants? Give the genotype of F 2 generation.

Genes follow inheritance patterns such as autosomal dominant, autosomal recessive, X-linked dominant, and X-linked recessive. These patterns dictate how traits are passed from one generation to the next.

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  • 2 2 Answers
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Sandeep Jha
Sandeep Jha
Asked: December 26, 2023In: Class 10 Science

It would cost a man Rs. 3.50 to buy 1.0 kW h of electrical energy from the Main Electricity Board. His generator has a maximum power of 2.0 kW. The generator produces energy at this maximum power for 3 hours. Calculate how much it would cost to buy the same amount of energy from the Main Electricity Board.

Electrical energy is a form of energy resulting from the movement of charged particles (electrons). It powers electronic devices and is generated from various sources, including fossil fuels, renewables, and nuclear.

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