Please select a subject first
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State whether a magnetic field is associated or not around a current carrying conductor.
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Which colour of white light is deviated most.
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Which colour of white light is deviated at least?
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Write approximate wavelength for (i) blue (ii) red light. Which colour has the higher speed in a vacuum? Which colour has the higher speed in the glass?
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State and explain ‘Ampere’s Swimming Rule’ to determine the direction of magnetic field (or magnetic lines of force) around a current carrying conductor.
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An imaginary material reflects red light, scatters green light, transmits blue light, and absorbs yellow, orange, and violet light. A cube of this material is shown in the given diagram.
The surface is illuminated with a beam of white light. What colour will this cube appear?
(i) from above,
(ii) from below and
(iii) from the sides?
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Describe an experiment to show that there is a magnetic field around a current carrying conductor.
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A block of glass is pushed into the path of the light as shown below. Then the converging point x will:
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What does the direction of current convey?
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At what frequency is the a.c. supplied to our houses?
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By using a compass needle describe how can you demonstrate that there is a magnetic field around a current carrying conductor.
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What is nucleus of an atom? Compare its size with that of the atom. Name its constituents. How is the number of these constituents determined by the atomic number and mass number of the atom?
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What is the range of wavelength of the spectrum of white light nm?
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A brass ball is hanging from a stiff cotton thread. Draw a neat labeled diagram showing the forces acting on the brass ball and cotton thread
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How does the magnitude of this non-contact force on the two bodies depend on the distance of separation between them?
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An effort is applied on the bigger wheel of a gear having 32 teeth. It is used to turn a wheel of 8 teeth. Where it is used.
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On reversing the direction of the current in a wire, the magnetic field produced by it gets ______.
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What is the SI unit of the moment of force?
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Name the factors affecting the turning effect of a body
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How is work done by a force measured when the force is in an angle to the direction of displacement?
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