A room is heated by means of a charcoal fire, an occupants of the room standing away from the fire is warmed mainly by
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2018
Which of the following is not a product of nuclear fusion?
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2018
The process by which protons are converted into helium atoms with a tremendous release of energy is called?
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2018
Which of the following phenomena is the practical evidence for the existence of the continual motion of molecules.
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2018
Water of mass 150g at 60\(^o\)c is added to 300g of water at 20\(^o\)c and the mixture is well stirred. Calculate the temperature of the mixture.(neglect heat losses to the surroundings)
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2018
Mercury which is spilled onto a glass surface forms ball-like shapes because____.
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2018
A 40W instrument has a resistance 90 Ohms. On what voltage should it be operated normally
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2018
Which of the following is an essential physical property of the wires uses for making fuses ?
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2018
A man hears his echo from a nearby hill 2s after he shouted. If the frequency of his voice is 260Hz and the wavelength is 1.29m, how far away is the hill
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2018
A solid cube of side 50cm and mass 75kg floats in a liquid with \(\frac{1}{3}\) of its height above the liquid surface. The relative density of the liquid is?
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2018
A car traveled at a uniform speed of 100km/h, spends 15m moving from point A to point B along its route. The distance between A and B is
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2018
Which of the following concepts is not an evidence of the particles nature of matter?
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2018
The product of force and time is?
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2018
Temperature is the property of a body which is proportional to the ____.
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2018
What flows to the earth by connecting the conductor to the earth?
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2018
An electric heating coil rated at 1KW is used to heat 2kg of water for 2 minutes. The initial water temperature is 30\(^o\)C. Taking the specific heat of the water as 4,000Jkg \(^{-1}\) and neglecting that of the contain…
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2018
A beam of light is incident from air to water at an angle of 300. Find the angle of refraction if the refractive index of water is 4/3
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2018
The resistance of a 40W car head lamp, drawing current from a 12V battery is ____.
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2018
A force of 5N acts at a point Y on a rod XYZ as shown in this diagram. If XYZ is 2m, what is the moment of the force about point X?
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2018
The energy needed to move a unit positive charge around a complete electric circuit is called the