Questions by Doubtly

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1 answer 423 views

a. What is meant by latent heat? How will the state of matter transform if latent heat is given off?

asked Sep 27, 2021 in Chapter 5: Heat

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1 answer 442 views

c. In cold regions in winter, the rocks crack due to anomalous expansion of water.

asked Sep 27, 2021 in Chapter 5: Heat

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1 answer 337 views

b. How can you relate the formation of water droplets on the outer surface of a bottle taken out of refrigerator with formation of dew?

asked Sep 27, 2021 in Chapter 5: Heat

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1 answer 470 views

a. What is the role of anomalous behaviour of water in preserving aquatic life in regions of cold climate?

asked Sep 27, 2021 in Chapter 5: Heat

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1 answer 381 views

Explain the following temperature versus time graph.

asked Sep 27, 2021 in Chapter 5: Heat

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1 answer 252 views

While deciding the unit for heat, which temperatures interval is chosen? Why?

asked Sep 27, 2021 in Chapter 5: Heat

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1 answer 639 views

What is meant by specific heat capacity? How will you prove experimentally that different substances have different specific heat capacities?

asked Sep 27, 2021 in Chapter 5: Heat

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1 answer 383 views

2. Observe the following graph. Considering the change in volume of water as its temperature is raised from 0 o C,

asked Sep 27, 2021 in Chapter 5: Heat

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1 answer 211 views

1. Fill in the blanks and rewrite the sentence.

asked Sep 27, 2021 in Chapter 5: Heat

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1 answer 251 views

11. Identify the figures and explain their use.

asked Sep 27, 2021 in Chapter 4: Effects of electric current

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1 answer 266 views

Name the following diagrams and explain the concept behind them.

asked Sep 27, 2021 in Chapter 4: Effects of electric current

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1 answer 442 views

What is a solenoid? Compare the magnetic field produced by a solenoid with the magnetic field of a bar magnet. Draw neat figures and name various components.

asked Sep 27, 2021 in Chapter 4: Effects of electric current

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1 answer 181 views

Which of the statement given below correctly describes the magnetic field near a long, straight current carrying conductor?

asked Sep 27, 2021 in Chapter 4: Effects of electric current

+1 vote

1 answer 258 views

Video Lecture on Kepler's law

asked Sep 27, 2021 in Lecture

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1 answer 247 views

In practice the unit kWh is used for the measurement of electrical energy, rather than joule.

asked Sep 26, 2021 in Chapter 4: Effects of electric current

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1 answer 264 views

For electric power transmission, copper or aluminium wire is used.

asked Sep 26, 2021 in Chapter 4: Effects of electric current

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1 answer 230 views

In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster etc. an alloy such as Nichrome is used, not pure metals

asked Sep 26, 2021 in Chapter 4: Effects of electric current

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1 answer 320 views

a. Tungsten metal is used to make a solenoid type coil in an electric bulb.

asked Sep 26, 2021 in Chapter 4: Effects of electric current

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1 answer 360 views

6. How does the short circuit form? What is its effect?

asked Sep 26, 2021 in Chapter 4: Effects of electric current

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1 answer 465 views

5. Which device is used to produce electricity? Describe with a neat diagram. a. Electric motor b. Galvanometer c. Electric Generator (DC) d. Voltmeter

asked Sep 26, 2021 in Chapter 4: Effects of electric current