1.Nikel is
(A) paramagnetic
(B) Diamagnetic
(C) Ferromagnetic
(D) None of these
Ans:- (A) paramagnetic
2. The angle between magnetic meridian and geographical Meridian is called
(A) angle of Dip
(B) declination
(C) horizontal component of magnetic field
(D) Apparent angle of Dip
Ans:- (B) declination
3. The radius of curvature of is surface of a biconvex lens is 20 cm and the refractive index of the material of the lens is 1.5 the focal length of the lens is
(A) 20 m
(B) (1/20) m
(C) 20 cm
(D) (1/20) cm
Ans:- (C) 20 cm
4. For same wavelength of electron and photon which physical quantity will be same
(A) velocity
(B) Energy
(C) Momentum
(D) Angular momentum
Ans:- (C) Momentum
5. The function of moderator in nuclear reactor is to
(A) slow the speed of neutrons
(B) fast the speed of neutrons
(C) slow the speed of electrons
(D) past the speed of electrons
Ans:- (A) slow the speed of neutrons
