The rest mass of a deuteron is equivalent to an energy of 1876MeV, that of a proton to 939 MeV, and that of a neutron to 940 MeV. A deuteron may disintegrate to a proton and a neutron if it

1) emits an X-ray photon of energy 22 MeV
2) captures an X-ray photon of energy 22 MeV
3) emits an X-ray photon of energy 33 MeV
4) captures an X-ray photon of energy 33 MeV

 A conducting loop lies in the plane of this page and carries a clockwise induced current. Which of the following statements could be true?

(1) A constant external magnetic field is directed into the page.

(2) A constant external magnetic field is directed out of the page.

(3) An increasing external magnetic field is directed into the page.

(4) A decreasing external magnetic field is directed into the page.

Two charges q1 and q2, are separated by a distance r and apply a force F to each other. If both charges are doubled and the distance between them is also doubled, find out the new force between them ?

1) $$\dfrac{1}{2}F$$
2) $$\dfrac{1}{3}F$$
3)$$F$$
4) $$8F$$

At what height from the surface of earth thegravitation potential and the value of g are –5.4 × 10⁷ J kg^–2 and 6.0 ms^–2 respectively ?Take the radius of earth as 6400 km :

1) 2600 km
2) 1600 km
3) 1400 km
4) 2000 km

A concave mirror is placed over a beaker containing water of (µ = 1.33) and image of the object placed at the bottom of beaker is formed at a distance of 25 cm from the top then focal length of the mirror is

An electric dipole is placed at an angle of 30^o with an electric field of intensity 2 × 10⁵NC⁻¹. It experiences a torque equal to 4 N mm. The charge on the dipole of the dipole length is 2 cm is

1) 8 mC
2) 4 mC
3) 6 mC
4) 2 mC

In Young's double slit experiment,the angular position of a point on the central maxima whose intensity is one fourth of maximum intensity

1) sin⁻¹(λ/d)    
2) sin⁻¹(λ/2d)  
3) sin⁻¹(λ/3d)    
4) sin⁻¹(λ/4d)

An ideal gas has a volume of 3 l at 2 atom pressure. Keeping the temperature constant, the pressure is doubled. Then the volume of the gas will be:

(1) 1.5 l
(2) any value
(3) 3 l
(4) 6 l

The n-type semi-conductor is:

(1) Germanium doped with aluminum
(2) Silicon doped with indium.
(3) Germanium doped with arsenic
(4) Germanium doped with indium.

Two points P and Q perform SHM along the same straight line, greatest distance between P and Q noticed by an observer studying the motion is found to be A (A=amplitude). Hence, we can deduce that in this case P leads Q ( or Q leads P) by a phase angle of

1) $$\pi$$
2) $$\dfrac { 2\pi }{ 3 }$$
3) $$\dfrac { \pi }{ 2 }$$
4) $$\dfrac { \pi }{ 3 }$$