MPPSC Scientific Officer Physics 2013 Paper

MPPSC Scientific Officer Physics 2013 Paper recruitment for Madhya Pradesh State Forensic Science Laboratory

The trace of a 3 x 3 matrix is 2. Two of its eigenvalues are 1 and 2. The third eigenvalue is
(a) -1
(b) 0
(c) 1
(d) 2

Sij and Aij represent a symmetric and an antisymmetric real valued tensor respectively in three dimensions. The number of independent components of Sij and Aij are
(a) 3 and 6 respectively
(b) 6 and 3 respectively
(c) 6 and 6 respectively
(d) 9 and 6 respectively

There are four machines and it is known that exactly two of them are faulty. They are tested, one by one, in a random order till both the faulty machines are identified. Then the probability that only two test are needed is
(a) 1/3
(b) 1/2
(c) 1/6
(d) 1/4

A tranducer is any device which
(a) converts energy in one form into another form
(b) Retains data in its memory
(c) is used in transformers
(d) cannot detect a change in physical quantity by itself

In Stern-Garlach experiement
(a) Both electric and magnetic field were applied
(b) Only non-uniform magnetic field was applied
(c) Only non-homogenous electric field was applied
(d) Only uniform magnetic field was applied

An electron spinning about its axis possesses a magnetic dipole moment and its value is
(a) eh/m
(b) eh/2m
(c) eh/4m
(d) 1

The ionisation potential of the hydrogen atom is 13.6 volt. The first excitation potential of the hydrogen atom is
(a) 10.2 eV
(b) 13.6 eV
(c) 10.2 eV
(d) -13.6 eV

If the Lagrangian of system does not explicitly depend on the time, and transformation equations do not depend on time also. Then the total energy of the system is
(a) Not conserved
(b) Zero
(c) Conserved
(d) None of these

Which is invariant under a Galiean transformation ?
(a) Displacement
(b) Velocity
(c) Momentum
(d) Force

Ampere’s law is modified by
(a) Gauss
(b) Faraday
(c) Maxwell
(d) Dirac

To mathc a transmission line the stub matching is used when
(a) It is possible to control the terminating impedance of line
(b) It is not possible to control the terminating impedance of line
(c) The characteristic impedance is not fixed
(d) None of the above

A wave is propagated in a parallel plane guide operating in TE mode at a frequency of 6 Gc/s. The separation between planes is 7.5 cm. Then the cut-off wavelength for the dominant mode is
(a) 5.30 cm
(b) 5.77 cm
(c) 1.25 cm
(d) 2.55 cm

The direction gain for an antenna which has a radiation resistance 70 ohms, a loss resistance of 10 ohms, and a power gain of 15 is
(a) 17.54
(b) 17.08
(c) 17.14
(d) 15.35

A wave guide section in a microwave circuit will act as a
(a) Low pass filter
(b) Band-pass filter
(c) High pass filter
(d) Band stop filter

Ehronest’s theorem states that
(a) The motion of a wave packet not agrees with the motion of the corresponding classical particle
(b) Schrodinger equation leads to the classical laws of motion on the average
(c) Schrodinger equation does not lead to the Newton’s law of motion on the average
(d) None of the above