Solve 2012 CBSE-Physics Question Paper (Set-3) given here.
1. Why is the potential inside a hollow spherical charged conductor constant and has the same value as on its surface?
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2. A magnetic needle, rree to rotate in a vertical plane, orients itself vertically at a certain place on the Earth. what are
the values of (i) horizontal comnponent of Earth's magnetic field and (ii) angle of dip at this place ?
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3. Name the electromagnetic waves, which (i) maintain the Earth's warmth and (ii) are used in nircraft navigation.
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5. How does focal length of a lens change when red light incident on it is replaced by violet light ? Give reason for your
answer.
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6. Write the relationship between the size of a nucleus and its mass number (A).
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