SPSC Lecturer Physics Past Papers

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SPSC Lecturer Physics Past Papers MCQs for Sindh Public Service Commission lecturer test preparation online.

SPSC Lecturer Physics Past Papers

Antonym of “Stale”
  1. Sour
  2. Dry
  3. Fresh
  4. Flag
Synonym of embezzle is?
  1. remunerate
  2. clear
  3. balance
  4. misappropiate
Antonym of Heartfelt
  1. genuine
  2. unfeigned
  3. apathetic/insincere
  4. none of these
The train went_____the tunnel.
  1. From
  2. Under
  3. Through
  4. To
The quality of public healthcare_____on the amount of money allocated to it.
  1. Depends
  2. Dependent
  3. Depending
  4. Depend
The professor told her student about the project months in advance so that they would have_____time to complete their work.
  1. Chronological
  2. Constant
  3. Insufficient
  4. Ample
I am worried____the exam.
  1. In
  2. About
  3. On
  4. Of
There is no point____arguing.
  1. To
  2. Over
  3. In
  4. On
He____daily for a year now.
  1. Exercises
  2. Was exercising
  3. Has been exercising
  4. Exercising
If you had followed the rules, you_____disqualified.
  1. Will not be
  2. Would not be
  3. Will not have been
  4. Would not have been
If vector field A = (x + 3y)i + (y – 2z)j + (x + mz)k is solenoidal, then the value of m is?
  1. 2
  2. 3
  3. -2
  4. 0
The parameters that Kepler’s Law of period relates to?
  1. The semi-minor axis and the time period
  2. Eccentricity and the time period
  3. The planet’s area of sweep and the time period
  4. The semi-major axis and the time period
What happens when the stress applied to the body is increased beyond the maximum value and is removed after some time?
  1. The body will come back to its original position
  2. The body will oppose the stress
  3. The body becomes hot
  4. The body cannot return to its original position
Which of the following is a four-level laser?
  1. ND: YAG
  2. Ruby laser
  3. He-Ne laser
  4. Semiconductor laser
A physical system undergoing forced vibration is called?
  1. Free harmonic oscillation
  2. Frequency harmonic oscillation
  3. Driven harmonic oscillator
  4. None
What is the effect of increasing the number of sits on the intensity of Central maxima of diffraction pattern of a diffraction grating?
  1. Intensity of central maxima will decrease
  2. Intensity of central maxima will increase
  3. There will not be any effect
  4. Diffraction pattern will disappear
Einstein’s photoelectric equation is?
  1. hv = (1/2 mv^2) max
  2. hv = 2hvo
  3. hv = hvo + (1/2 mv^2) max
  4. hv = hvo/2
FCC lattice is the reciprocal lattice of the?
  1. BCC lattice
  2. SC lattice
  3. HCP lattice
  4. Both B and C
A vector field with a vanishing curl is called as?
  1. Solenoidal
  2. Irrotational
  3. Rotational
  4. Cycloidal
Find the maximum value of resolving power of a grating 3 cm wide having 5000 lines per cm, if the wavelength of light used is 5890 A?
  1. 40000Å
  2. 45000Å
  3. 4500Å
  4. 5000Å
Which of the following is not a postulate of Kinetic molecular theory of gases?
  1. In gases there is a predominance of intermolecular energy
  2. Collisions of gas molecules are elastic
  3. All molecules have same speed at different temperatures
  4. Do not exert the same pressure in all directions
How many fission take place per second in a 300 MW reactor, assuming each fission releases 200 MeV of energy?
  1. 2.38 x 10^18
  2. 9.38 x 10^18
  3. 4.38 x 10^18
  4. 8.38 x 10^18
During projectile motion, the horizontal component of velocity?
  1. Changes with time
  2. Becomes zero
  3. Remains constant
  4. Increases with time
Soap film exhibits brilliant colours in sun light due to?
  1. Dispersion of light
  2. Interference of light
  3. Diffraction of light
  4. Scattering of light
Increase in the entropy means the increase in?
  1. Disorder
  2. Unavailability of energy
  3. Randomness
The light of suitable frequency falling on metal surface ejects electrons, this phenomenon is called?
  1. X-ray emission
  2. Compton effect
  3. Nuclear fission
  4. Photoelectric effect
Which of the following series of H-spectrum lies in ultraviolet region?
  1. Lyman series
  2. Balmer series
  3. Paschen series
  4. Bracket series
Choose the correct statement for a nuclear reactor?
  1. Moderator slow down the neutron
  2. Moderator bring the neutrons to rest
  3. Moderator absorb the neutron
  4. Moderator reflect the neutron
Average distance covered by alpha particle in air before its ionizing power ceases is called its?
  1. Trajectory
  2. Range
  3. Firing level
  4. Limit
The net electric field is zero?
  1. Inside any conductor
  2. Inside any conductor with a static charge
  3. Inside any material, conductor or insulator, with a static charge
  4. The electric field cannot be zero
An electric field exerts a torque on a dipole only if?
  1. The field is parallel to the dipole moment
  2. The field is negative
  3. The field is perpendicular to the dipole moment
  4. The field is positive
When N-type semiconductor is heated?
  1. Number of electrons increases while that of holes decreases
  2. Number of holes increases while that of electrons decreases
  3. Number of electrons and holes remain same
  4. Number of electron and holes increases equally
Two charges are placed a certain distance apart in air. When a dielectric sheet is placed between them, the electrostatic force between them will?
  1. Decrease
  2. Increase
  3. Remain unchanged
  4. Become zero
Which of the these is the best description of a zener diode?
  1. It operates in reverse region
  2. It is a constant voltage device
  3. It is a constant current device
  4. All of these
What is required in a fusion reactor, in order to over come the electrostatic repulsive force between nuclides?
  1. Very high pressure
  2. Very high temperature
  3. Very small volume
  4. All of these
The period of the Physical Pendulum is?
  1. T = 2π√1/Mgd
  2. T = 2π √1/x
  3. T = √4^1/MgR
  4. All of these
Over-damping results in?
  1. Slower return to equilibrium
  2. Faster return to equilibrium
  3. Equilibrium is never achieved
  4. Unrhythmic to equilibrium
Two spheres of same material have radii r1 and r2. They are heated to same temperature and kept in same enclosure at low temperature. Their rates of loss of heat are in the ratio?
  1. r1/r2
  2. r2/r1
  3. (r1/r2)^2
  4. (r2/r1)^2
Which of the following statement is wrong?
  1. Rough surfaces are better radiators than smooth surfaces
  2. Highly polished mirror surfaces are very good radiators
  3. Black surfaces are better absorbs that white ones
  4. Black surfaces are better radiators then white ones
If the temperature of the sun is doubled, the rate of energy received on the earth will be increased by a factor of?
  1. 2
  2. 4
  3. 8
  4. 16
A body in a room cools from 90°C to 80°C in 5 minutes. The time taken to cool from 70°C to 60°C is?
  1. Less than 5 minute
  2. 5 minute
  3. More than 5 minute
  4. Less or more than 5 minutes depending upon the nature of the body
Which of the following is not a property of solids?
  1. The solids have a high density in comparison to gasses
  2. Solids have definite shape
  3. Solids have an indefinite volume, not easily compressed
  4. Solids have relatively strong intermolecular force
The repulsive energy is always?
  1. Negative
  2. Positive
  3. Could be either positive or negative depending on the conditions
  4. None of these
Repeatable entity of a crystal structure is known as?
  1. Crystal
  2. Lattice
  3. Unit cell
  4. Miller indices
In a simple model, the unforced rising of hot air can be attributed to?
  1. Orographic lifting
  2. The low specific heat of air
  3. Buoyancy
  4. Steam rising
A disc of mass 2 kg and diameter 2m is performing rotational motion. Find the work done, if the disc is rotating from 300 rpm to 600 rpm?
  1. 1479 J
  2. 14.79 J
  3. 147.9 J
  4. 1.479 J
The mean free path of nitrogen molecules at 27°C is 3 x 10^-7 m/s. If the average speed of nitrogen molecules at the same temperature is 600 m/s then the collision frequency will be?
  1. 10^-9/sec
  2. 1.5 x 10^-9/sec
  3. 2 x 10^-9/sec
  4. 3 x 10^-9/sec
The average translational K.E. of the molecules in a sample of oxygen at 300K is 6 x 10-20. What is the average translational energy at 750 K?
  1. 2 x 10^-19 J
  2. 1.5 x 10^-19 J
  3. 3.5 x 10^-18 J
  4. 3.5 x 10^-21 J
x → Ni 6528 + y. Identify the missing nuclide in gamma decay.
  1. O178
  2. Po21584
  3. Fe5522
  4. Ni6528

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