Please select a subject first
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Classify the following amongst contact and non-contact forces.
electrostatic force
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Classify the following amongst contact and non-contact forces.
magnetic force
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State the function of the following in a house circuiting kWh meter.
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In what unit does the electric meter in a house measure the electrical energy consumed? What is its value in S.I unit?
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Where is the main fuse in a house circuit connected?
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How should the several electric lamps be connected with the mains so that the switching on or off a lamp has no effect on the operation of other lamps?
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Two sets A and B of four bulbs each are glowing in two separate rooms. When one of the bulbs in set A is fused, the other three bulbs also cease to glow. But in set B, when one bulb fuses, the other bulbs continue to glow. Explain the difference in the two sets.
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The electric meter in a house records the consumption of ______.
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Draw a diagram showing the directions of three magnetic field lines due to a straight wire carrying current. Also show the direction of current in the wire.
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How is the magnetic field due to a straight current carrying wire affected if current in wire is decreased?
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How is the magnetic field due to a straight current carrying wire affected if current in wire is reversed?
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A ray of light A incident from air suffers partial reflection and refraction at the boundary of water.
- Complete the diagram showing (i) the reflected ray B and (ii) the refracted ray C.
- How are the angles of incidence i and refraction r related?
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A small air bubble in a glass block when seen from above appears to be raised because of ______.
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Give an example for each of the following uses of a machine:
to change the point of application of force
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Give an example of the following uses of a machine:
to change the direction of force
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One joule is the amount of work done when a force of ......... moves a body through a distance of .......
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What is the work done when no net force is applied on the body?
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Concept: undefined >> undefined
