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Physics
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What is an electroscope? Describe the different stages of charging a gold leaf electroscope negatively with the help of a diagram.
Chapter: [8.2] Magnetism
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Explain with a suitable diagram, the converging of a parallel beam of light rays by a concave mirror.
Chapter: [6] Light
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If the radius of curvature of a concave mirror is 30 cm, what is its focal length?
Chapter: [6] Light
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The atmospheric pressure is 75 cm of mercury. Express it in Nm-2.
Chapter: [4.1] Fluids
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Why can't water be used in place of mercury in a barometer?
Chapter: [4.1] Fluids
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What physical quantity is measured in the bar?
Chapter: [4.1] Fluids
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Why does the velocity of a stone thrown vertically upwards decreases?
Chapter: [2] Motion in One Dimension
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Deduce an expression for the pressure at a depth inside the liquid.
Chapter: [4.1] Fluids
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How does atmosphere pressure vary with height?
Chapter: [4.1] Fluids
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Why is mercury used in a barometer?
Chapter: [4.1] Fluids
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What is meant by atmospheric pressure?
Chapter: [4.1] Fluids
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What is the value of atmospheric pressure?
Chapter: [4.1] Fluids
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Name the instrument used to measure atmospheric pressure.
Chapter: [4.1] Fluids
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What does a falling barometer indicate?
Chapter: [4.1] Fluids
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How does the atmospheric pressure change with altitude?
Chapter: [4.1] Fluids
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State two factors which affect the atmospheric pressure as we go up.
Chapter: [4.1] Fluids
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What is the purpose of a barometer? State two major defects of a simple barometer.
Chapter: [4.1] Fluids
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