If C and L denote the capacitance and inductance respectively, the units of LC are

 

1.  [M⁰L⁰T²]

2.  [M⁰L²T^-2]

3.  [MLT^-2]

4.  [M⁰L⁰T⁰]

 

The K_α line from Molybdenum (atomic number = 42) has a wavelength of 0.7078Å. The wavelength of K_αline of zinc (atomic number = 30) will be

 

A body of mass 0.5 kg is projected under gravity with a speed of 98 m/s at an angle of 60 ° with the horizontal. The change in momentum (in magnitude) of the body is

 

1.  24.5 N-s
2.  49.0 N-s
3.  98.0 N-s
4.  50.0 N-s

The diameter of the objective of a telescope is 0.1 m and the wavelength of the light is 6000 Å. Its resolving power would be approximately

The dispersive powers of glasses of lenses used in an achromatic pair are in the ratio 5 : 3. If the focal length of the concave lens is 15 cm, then the nature and focal length of the other lend would be

 

1.  convex, 9 cm
2.  concave, 9 cm
3.  convex, 25 cm
4.  concave, 25 cm

A charge Q is divided into two parts of q and Q-q. If the coulomb repulsion between them when they are separated is to be maximum, the ratio of  should be

 

1.  2
2.  1/2
3.  4
4.  1/4

 

A rectangle vessel when full of water, takes 10 mint to be emptied through an orifice in its bottom. How much time will it take to be emptied when half filled with water?

 

 

1.  9 min
2.  7 min
3.  5 min
4.  3 min

If there were no gravity, which of the following will not be there for a fluid?

 

1.  Viscosity
2.  Surface tension
3.  Pressure
4.  Archimedes’ upward thrust

A = 4i + 4j – 4k and B = 3i + j + 4k, then angle between vectors A and B is

 

Consider the following statements 
(i) For a permanent magnet the area of a hysteresis loop is allowed to be large. 
(ii) Coercively of the material in permanent magnets should be small. 
Which of the following statements is/are true?

 

1.  (i) but not (ii)
2.  (ii) but not (i)
3.  Both (i) and (ii)
4.  Neither (i) nor (ii)