February 27, 2020

XI Physics| Past Paper MCQs |2017

This Video contains solution of the following MCQs.
1.A bus of weight 30000 N is moving with uniform velocity of 14 m/s, its acceleration is:
*14 m/s2   *zero   *7 m/s2  *9.8 m/s2

2.The angular speed of the minute hand of a clock is:
*π/30   *π/60   *π/1800   *π/3600

3.A projectile is fired at an angle θ with the horizontal will be minimum at:
*the highest point     *the point of projection
*all points of its path    *the point of landing on ground

4.Torque is maximum when force:
*is parallel to moment arm   *as anti parallel to moment arm
*makes angle 60 degree with moment arm * is perpendicular to moment arm

5.Light year is the unit of:
*time    *distance   *velocity   *luminous intensity

6.The ocean tides are caused by:
*earth’s gravitational force only    * moon’s gravitational force only
* sun’s gravitational force only   * sun’s and moon’s gravitational force

7.If man a goes above the earth’s surface to a distance equal to thrice the earth’s radius, the value of acceleration due to gravity at that point becomes:
*1/3 g    *1/4 g   *1/9 g  *1/16 g

8.Both kilowatt hour and electron volt are the unit of :
*power    *energy   *charge  *angular momentum


9.If the frequency of fifth harmonic of a vibrating string is 200 Hz ,its fundamental frequency is:
*5 Hz    *25 Hz   *49 Hz   *100 Hz

10. The speed of sound in vacuum is:
*zero m/s    *332 m/s   *33200 cm/s`  *3 x 108 m/s

11. The distance between two consecutive nodes of a transverse stationary wave is equal to:
*λ/4     *λ/2   *λ   * 2λ

12. The number of lines per cm of a diffraction grating is 4000. Its grating element is:
*2.5 x 10-4  cm   *2.5 x 10-6  cm   *4 x 102  cm  *4 x 105 cm

13. An astronomical telescope is focused at infinity. The focal length of objective is 0.2 cm and that of the eye piece is 5cm, the length of telescope is:
*2.5 cm    *4 cm   *5.2 cm  *25 cm

14. The ratio of SI unit of angular momentum to linear momentum is:
*J.s      *N/J    *J.N   *J/N

15. The number of significant figure in 1.6 x 10-19 is:
*2     *3    *4   *6

16. The magnitude of product k.(j x i):
*zero     *1    *-1 `   *k

17. Stokes law is applicable to the:
*bodies resting on the surface of liquid
*moving bodies through the viscous medium
*moving bodies through the non viscous medium
*moving bodies through vacuum


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