The question paper for previous year for the Common Entrance Test held by GGSIPU for admission to courses offered by it is as follows:

1. Following two wave trains are approaching each other.
y1= a sin 200 πt y2= a sin 208 πt
The number of beats heard per second is :
A. 8 B. 4 C. 1 D. 0

2. One of the geo-stationary satellites of India is vertically above
A. New Delhi B. Mumbai C. Allahabad D. None of these

3. Light of wavelength 2400 x 10
-10
m in air will become light of wavelength in glass (µ= 1.5)
equal to
A. 1600 x 10
-10
m B. 7200 x 10
-10
m C. 1080 x 10
-10
m D. none of these

4. The ratio of secondary to primary turns is 4:5. If power input is P, what will be the ratio of power output (neglect all losses) to power input ?
A. 4:9 B. 9:4 C. 5:4 D. 1:1

5. Lenz's law applies to
A. electrostatics B. lenses
C. electro-magnetic induction D. cinema slides

6. If a proton and anti-proton come close to eachother and annihilate, how much energy will be released ?
A. 1.5 x 10
-10
J B. 3 x 10
-10
J C. 4.5 x 10
-10
J D. none of these

7. If Sn is doped with As, what will be the result?
A. n-type semiconductor
B. p-type semiconductor
C. intrinsic semiconductor
D. none of these

8. A charge is placed at the centre of a cube, what is the electric flux passing through one of its faces?
A. (1/6) x (q/ε0) B. q/ε0 C. 6q/ε0 D. None of these

9. What is the degree of freedom in case of a mono atomic gas ?
A. 1 B. 3 C. 5 D. None of these

10. Energy released in stars is due to
A. Fission B. Fusion C. Combustion D. Chemical reaction

11. Speed of recession of galaxy is proportional to its distance
Exam Guess Papers
A. directly B. inversely C. exponentially D. none of these

12. If a substance goes in a magnetic field and is pushed out of it,what is it ?
A. Paramagnetic B. Ferromagnetic C. Diamagnetic D. Antiferromagnetic

13. Which is not a scalar quantity?
A. Work
B. Power
C. Torque
D. Gravitational Constant

14. Minimum energy required to excite an electron in a Hydrogen atom in ground state is :
A. -13.6 eV B. 13.6 eV C. 10.2 eV D. 3.4 eV

15. If Gravitational Constant is decreasing in time, what will remain unchanged in case of a satellite orbiting around earth ?
A. Time period B. Orbiting radius C. Tangential velocity D.Angular velocity

16. If a transparent medium of refractive index µ= 1.5 and thickness t = 2.5 x 10
-5m is inserted in front of one of the slits of Young's Double Slit experiment, how much will be the shift in the interference pattern ? The distance between the slits is 5.0 x 10 -3 cm and that between slits and screen is 100 cm.
A. 5 cm B. 2.5 cm C. 0.25 cm D. 0.1 cm

17. How does light propagate in optical fibres?
A. Total internal
reflection
B. Refraction C. Reflection D. None of these

18. Dispersion of light is due to
A. wavelength B. intensity of light C.density of medium D. none of these

19. Which of the following conclusions is correct regarding
a stationary body?
A. No force is acting on the body
B. Vector sum of forcesacing on the body is zero
C. The body is in vacuum
D. The forces acting on the body do not constitute a couple