: CBSE Sample Question Papers

Long Answer Type Question

Q. 1, Derive the relation between the distance of object and distance of image formed by refraction at a spherical surface when object lies inside the optically rarer medium.
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Q. 2. What are sign conventions used in deriving lens maker’s formula ? Derive the formula also.
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Q, 3. Explain how spectrometer can be used to get pure spectra.
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Q. 4. What is dispersion of light ? With the help of a diagram, explain the construction of a spectroscope. How can it be used to determine the refractive index of the material of a prism ‘.’
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Q. 5. Explain compound microscope . Deduce an expression for magnifying power of a compound microscope .
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Q. 6. Explain total internal reflection. What are its conditions ?
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Long Answer Type Question

Q. 1. To show that has property of continuity along any closed path even when individually they may not be continuous.
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Q. 2. Explain Green house effect.
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Q. 3. A parallel plate capacitor made of circular plates each of radius R = 6.0 cm, has a capacitance C = 100 pF. The capacitor is connected to a 230 V A.C. supply with an angular frequency of 300 rad s
(a) What is the rms value of the conduction current ?
(b) Is the conduction current equal to the displacement current ?
© Determine the amplitude of B at a point 3.0 cm. from the axis between the plates.
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Q. 4. What is electromagnetic spectra? To what it is to?
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Q. 5. How can the population covered be determined from higher of a radio or T.V. antenna?
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