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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 m N m N 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 6. Relative permeability of one substance is 0.075. Its magnetic susceptibility is 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

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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 ?
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