05%20-%20Physics%20-%20March%202008

05%20-%20Physics%20-%20March%202008 - Time : 3 hours 05 -...

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Time : 3 hours 05 - Physics - March 2008 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 and simple electronic calculator can be used. 4. Write new Section on a new page. Follow the sequence. S E C T I O N A Questions 1 to 16 are multiple choice questions. Each carries ONE mark. Choose correct answer ( a, b, c, d ) from the given alternatives and write it. 16 1. There exists an electric field of 200 N/C along Z - direction. The flux passing through a square of 10 cm sides placed on XY plane inside the electric field is ….. Nm 2 C - 1 . ( a ) 1/4 ( b ) 4 ( c ) 1/2 ( d ) 2 2. A 4 μ F capacitor is charged up to 100 V. The plates of the capacitor are then connected with a conducting wire. How much heat will be generated in the above situation ? ( a ) 0.2 J ( b ) 0.02 J ( C ) 0.002 J ( d ) 2 J 3. The rating of a car battery of 12 V is 60 A, which means that 60 A of current will flow when the battery is connected to a conducting wire. The internal resistance of the battery will be ….. Ω . ( a ) 0.2 ( b ) 0.02 ( C ) 0.015 ( d ) 0.15 4. If hot junction is made cold and the cold junction is made hot, the …. ( a ) direction of e.m.f. does not change. ( b ) direction of current gets reversed. ( c ) direction of current does not change. ( d ) current is not obtained. 5. The speed of charged particle in a cyclotron is independent of ….. ( a ) its mass ( b ) its charge ( c ) its linear speed ( d ) magnetic field 6. With reference to the earth, the angle of dip at magnetic poles of the earth is ….. rad. ( a ) π ( b ) 2 π ( c ) π /4 ( d ) π /2 7. Magnetic flux linked with a coil is φ = 9t 2 + 2t - 3, where t is in second and φ is in Wb. At t = 1 sec., the induced emf = ….. V ( a ) 14 ( b ) 20 ( c ) 16 ( d ) 18 8. The real power in an A. C. circuit containing only inductor is equal to ….. W. ( a ) 2 L 2 1 I ( b ) I L 2 1 ( c ) ( d ) zero 2 L 2 I
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Time : 3 hours 05 - Physics - March 2008 Marks : 100 Pg - 2 9. If λ v , λ x and λ m represent the wave - lengths of visible light, X - rays and microwaves respectively, then ….. ( a ) λ m > λ v > λ x ( b ) λ m < λ v < λ x ( c ) λ m = λ v = λ x ( d ) none of these 10. Focal length of a thin lens made of the material of refractive index 1.5 is 10 cm. Its focal length, when it is kept in a medium of refractive index 4/3 would be ….. cm. ( a )
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This note was uploaded on 11/28/2011 for the course PHYSICS 300 taught by Professor Smith during the Spring '06 term at ITT Tech Flint.

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05%20-%20Physics%20-%20March%202008 - Time : 3 hours 05 -...

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