Physics : PRE Medical Entrance Question Bank
(Paper - 2)

1. A dipole is placed in a uniform electric field, its potential energy will be minimum when the angle between its axis and field is
A. 0 B. p C. p /2 D. 2p

2. Charge of 2 c is placed at the centre of a cube of volume 8 cc, what is electric flux passing through one face ?
A. 1/(3e0) B. (1/2) e0 C. 2/e0 D. 3/e0

3. 1 MeV is
A. 1.6 x 10-19 J B. 1.6 x 10-13 J C. 1.6 x 10-16 J D. 1.6 x 10-9 J

4. Fundamental frequency of a sonometer wire is n, if the tension is made 3 times and length and diameter are also increased 3 times, what is the new frequency ?
A. n/3Ö 3 B. 3n C. Ö 3 n D. 3Ö 3 n

5. What is the number of beats heard by the driver of a taxi which is approaching a wall at a speed 30 km/hr and emitting a sound of frequency 300 Hz ? Velocity of sound = 330 m/s.
A. 10 B. 15
C. 20 D. 25

6. A person is standing on a railway platform and a train is approaching, what is the maximum wavelength of sound he can hear ? Given wavelength of whistle = 1 m; speed of sound in air = 330 m/s; speed of the train = 36 km/hr.
A. 1 m B. 32/33 m C. 33/32 m D. 12/13 m

7. Velocity of sound in open-ended tube is 330 m/s, the frequency of waves is 1.1 kHz and the length of tube = 30 cm, which harmonic will it emit ?
A. 2nd B. 3rd C. 4th D. 5th

8. If both sprong constants K1 and K2 are increased to 4K1 and K2 respectively, what will be the new frequency, if f was the original frequency?
A. f B. 2f
C. (1/2) f D. 4f

9. The radii of two drops are in the ratio 3 : 2, their terminal velocities are
A. 9 : 4 B. 2 : 3 C. 3 : 2 D. 2 : 9

Go to part : - 1     2     3     4     5    6    7