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An object is placed in front of a concave lens at a distance of 45 cm
An object is placed in front of a concave lens at a distance of 45 cm from it. If its image is…
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An object is placed at 2F position of a convex lens
(a) An object is placed at 2F position of a convex lens. Draw a ray diagram showing the formation of the image.…
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A rectangular glass block has an air bubble trapped inside it
A rectangular glass block of refractive index 1.5 has an air bubble trapped inside it as shown in the diagram. When seen…
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Out of the three rays shown, which ray will suffer Total Internal Reflection
(a) Out of the three rays (I, J, H) shown in the diagram, which ray will suffer Total Internal Reflection while inside…
Question
Curium is a radioactive element named in honour of Madam Curie
Curium is a radioactive element with the symbol named in honour of Madam Curie. The graph of number of protons vs number…
Question
A current flows through a metallic conductor for a long period of time
A current flows through a metallic conductor for a long period of time. State the change you would expect in its: (a)…
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Copper wire is wound around a steel bar FT
Copper wire is wound around a steel bar FT. Current is allowed to pass through the coil for some time and then…
Question
Calculate the amount of heat absorbed by 200 g of paraffin wax
Calculate the amount of heat absorbed by 200 g of paraffin wax to melt completely at its melting point. [Specific latent heat…
Question
Which current produces a varying magnetic field when it flows through a conductor
(a) Which of the two, alternating current or direct current, produces a varying magnetic field when it flows through a conductor? (b)…
Question
According to the NEW colour convention which colour of wire is connected to
According to the NEW colour convention which colour of wire is connected to: (a) the metal body of the appliance (b) the…