01%20-%20Physics%20-%20January%202006

01%20-%20Physics%20-%20January%202006 - Time : 3 hours 01 -...

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Time : 3 hours 01 - Physics - January 2006 Marks : 100 Pg - 1 Instructions : 1. There are 4 Sections and total 60 questions in this question paper. 2. Symbols used in this question paper have their usual meanings. 3. Log table or simple electronic calculator can be used. 4. Write new Section on a new page. S E C T I O N A Questions 1 to 16 are multi - choice questions. Choose the correct option. Each question is of ONE mark. 16 1. What is electric force of repulsion in newton between two electrons kept 1 cm apart ? ( a ) 2.3 x 10 - 19 ( b ) 2.3 x 10 - 24 ( c ) 2.3 x 10 - 20 ( d ) 2.3 x 10 - 9 2. The electric potential inside a hollow charged sphere is ( a ) constant. ( b ) directly proportional to the distance from the centre of the sphere. ( c ) inversely proportional to the distance from the centre of the sphere. ( d ) inversely proportional to the square of the distance from the centre of the sphere. 3. The S I unit of electric flux is ( a ) V m - 1 ( b ) 2 C m N ( c ) C m N 2 ( d ) V m 2 4. A wire of resistance R is cut into n equal parts. These parts are then connected in parallel. The equivalent resistance of the combination is ( a ) n R ( b ) n R ( c ) R n ( d ) 2 n R 5. To send 10 % of the main current through a moving coil galvanometer of resistance 99 ohm, the shunt required is ( a ) 10 ohm ( b ) 9.9 ohm ( c ) 9 ohm ( d ) 11 ohm 6. Relative permeability of one substance is 0.075. Its magnetic susceptibility is ( a ) 0.925 ( b ) - 0.925 ( c ) 1.075 ( d ) - 1.075 7. For a L, C, R connected in series with an A. C. source, L = 1 H, C = 20 μ F and R = 6 Ω , calculate Q factor. ( a ) 3.72 ( b ) 0.372 ( c ) 37.2 ( d ) 2.37 8. The self induced emf produced in a coil for a unit rate of change of current is equal to ( a ) the thickness of the coil. ( b ) number of turns of the coil. ( c ) self inductance of the coil. ( d ) magnetic flux linked with the coil.
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Time : 3 hours 01 - Physics - January 2006 Marks : 100 Pg - 2 9. In case of electro - magnetic waves, which one of the following has average value zero over one period ? ( a ) electric energy ( b ) magnetic energy ( c ) electric field ( d ) magnetic field 10. The angle of a prism is 60 ° and refractive index of its material is 1.5. There will be no emergent light, if the angle of incidence on the first face is ( a ) equal to 30 ° ( b ) equal to 60 ° ( c ) less than 27 ° ( d ) more than 30 ° 11. Waves which cannot be polarized are ( a ) electro - magnetic waves ( b ) light waves ( c ) longitudinal waves ( d ) transverse waves. 12.
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01%20-%20Physics%20-%20January%202006 - Time : 3 hours 01 -...

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