Please select a subject first
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Which nuclear radiation will travel undeviated in an electric field?
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Which of the following radiations suffer maximum deflection in a magnetic field?
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O is a luminescent particle trapped inside a glass block. A student traces the path of rays coming out of it and reflecting over a plane mirror as shown in the diagram below.
Complete the table, using the labels from the figure. The first label is done for you.
| Sr. No. | Description | Label |
| a. | An angle of reflection on the mirror | a |
| b. | A partially reflected ray in the glass slab | |
| c. | A critical angle | |
| d. | A refracted ray | |
| e. | An angle of refraction of the ray R |
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What mass of ice at 0°C added to 2.1 kg water, will cool it down from 75°C to 25°C? Given Specific heat capacity of water = 4.2 Jg-1 °C-1, Specific latent heat of ice = 336 Jg-1.
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A tuning fork is vibrating in air. State whether the vibrations are natural or damped?
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The figure below shows a dual control switch circuit use to light a bulb.
- Complete the circuit so that bulb is switched on.
- Mark the supply terminals with L and N to indicate live and neutral wires.
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Arrange the α, β and γ radiations in ascending order of their penetrating power.
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The distance between two bodies is doubled. How is the magnitude of the gravitational force between them affected?
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A uniform half meter rule balances horizontally on a knife-edge at 29 cm mark when a weight of 20 gf is suspended from one end
1) Draw a diagram of the arrangement
2) What is the weight of the half meter rule?
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A lens forms an upright and diminished image of an object when the object is placed at its focal point. Name the lens and draw a ray diagram to show the image formation.
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To which wire of a cable in a power circuit should the metal case of geyser be connected.
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Give an example of a non-contact force which is always of attractive nature
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On what factor does the position of the center of gravity of a body depend?
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Explain the motion of a planet around the Sun in a circular path.
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What is the weight of a body placed at the centre of the earth?
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A lens forms an erect, magnified, and virtual image of an object. Draw a labelled ray diagram to show the image formation.
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An electric iron is rated 220V, 2kW.
1) if the iron is used for 2h daily find the cost of running it for one week if it costs 4.25 per kWh
2) Why is the fuse absolutely necessary in a power circuit?
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State a factor on which the position of the centre of gravity of a body depend? Explain your answer with an example.
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What is the position of the centre of gravity of a rectangular lamina?
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