Home / Past Papers / PPSC Physics Subject specialist S S & SENIOR SUBJECT SPECIALIST S S S Past papers
PPSC Physics Subject specialist S S & SENIOR SUBJECT SPECIALIST S S S Past papers
PPSC Physics Subject specialist S S & SENIOR SUBJECT SPECIALIST S S S Past papers

PPSC Physics Subject specialist S S & SENIOR SUBJECT SPECIALIST S S S Past papers

PPSC Physics Subject specialist S S & SENIOR SUBJECT SPECIALIST S S S Past papers

Q#1:- A portable device which is widely used for the detection of ionizing particle or radiations:

  • Solid state dector
  • Geiger counter ( Right Answer)
  • Wilson cloud chamber
  • All of these
  • None of these

Q#02:- 1 Kwh=

  • 6×10^2 Joule
  • 6×10^5 Joule
  • 6×10^6 Joule
  • 36×10^5 Joule ( Right Answer)
  • 36×10^4 Joule

Q#03:- The essential part/s of a moving coil galvanometer is/are:

(I) A U-Shaped permanent magnet with cylindrical concave pole-pieces (II) A flat coil of thin enamel insulated wire usually rectangular (II) An spiral metallic wire connected to external terminal

  • I only
  • I & II only ( Right Answer)
  • I, II & III
  • II & III
  • III only

Q#04:- Calculate the centripetal acceleration and centripetal force on a man whose mass is 80 kg when resting on the ground at the equator if the radius of earth is 6.4×10^6 m.

  • 69 N
  • 35 N
  • 69 N ( Right Answer)
  • 65 N
  • 78 N

Q#05:- The process of combining audio frequency (a-f) and radio frequency (r-f) waves to accomplish translational is called:

  • Transmission
  • Rectifier
  • Modulation ( Right Answer)
  • Crystal Diode
  • Carrier Signal

Q#06:- A convex lens of focal length 20 cm, is used to form an erect image which is twice as long as the object. Find the position of the object?

  • 10 cm ( Right Answer)
  • 20 cm
  • -20 cm
  • 5 cm
  • -30 cm

Q#07:- The electron acquires a speed of 10^6 ms^-1. Find its energy in electron volts:

  • 66 ev
  • 84 ev ( Right Answer)
  • 23 ev
  • 34 ev
  • 68 ev

Q#08:- A basic electric instrument which is used for the detection (or measurement) of small current:

  • Ammeter
  • Voltmeter
  • Galvanometer ( Right Answer)
  • Transmeter
  • All of these

Q#09:-ΔV/ΔS is the rate of change of potential with respect to the distance and it is called:

  • Electric field
  • Electric flux
  • Potential Difference
  • Potential Gradient ( Right Answer)
  • Electric intensity

The resonant frequency of an LC-Circuit is:

 

  • f = 2Π LC
  • f = 1 / 2Π√ LC
  • f = 1/ 2LC
  • None of these

Q#10:- Which one of the following is NOT needed in Nuclear Fission reactor?

  • fuel
  • accelerator
  • moderator
  • None of these

Q#11:- A Watt – sec is a unit of:

  • Force
  • Energy
  • Power
  • None of these

Q#12:- The force on a charge moving with the velocity in a magnetic field B is given by:

  • F = (q/v x B)
  • F = ( qv x B )
  • F = (qv + B)
  • None of these

Q#13:- The half life of a radioactive isotope is 140 days. How many days would it take to loose 3/4 of its

Initial activities:

  • 105 days
  • 280 days
  • 35 days
  • None of these

Q#14:- A U-235 nucleus will split when it captures:

  • an α-particle
  • m. radiation
  • neutron
  • None of these

Q#15:- An LRC Circuit has R= 4Ω, Xc = 3 and XL=6, the impedance of the circuit is:

  • 5 Ω
  • 7 Ω
  • 13 Ω
  • None of these

Q#16:- A magnetic field cannot:

  • Accelerate a charge
  • Exert a force on a charge
  • Change the kinetic energy of a charge
  • None of these

Q#17:-For hydrogen atom the energy needed to ionize it is____________ electron volts and the corresponding ionization potential is____________.

  • 6 volts, 6 volts
  • 12 volts, 12.6 volts
  • 6 volts, 13 volts
  • 6 volts, 13.6 volts ( Right Answer)

Q#18:-The length of a measuring rod is 1 m when it is at rest. What will its length be if it is moving with a velocity one third of the speed of light.

  • 943 m ( Right Answer)
  • 346 m
  • 64 m
  • 563 m
  • 321 m

Q#19:-A changing current “i” in any circuit induces an emf “e” in that circuit, which is equal to:

  • e = di/dt
  • E = i dΦ/dt
  • e = – L di/dt
  • None of these

Q#20:-The resonant frequency of an LC-Circuit is:

  • f = 2Π LC
  • f = 1 / 2Π√ LC
  • f = 1/ 2LC
  • None of these

Q#21:- The induced current always flows in such a direction as to oppose the change which is giving rise to it, This state of:

  • Ampere’s law
  • Ohm’s law
  • Newton’s law
  • Hook’s law
  • Lenz’s law ( Right Answer)

Q#22:- A neutron travels a distance of 12 m in a time interval of 3.6×10^-4 s. Assuming its speed was constant, find its kinetic energy. Take 1.7×10^-27 kg as the mass of neutron.

  • 87 ev
  • 78 ev ( Right Answer)
  • 56 ev
  • -8.56 ev
  • 25 ev

Q#23:- The energy stored in the fossil fuel is

  1. chemical energy ( Right Answer)
  2. heat energy
  3. Electrical energy
  4. Elastic potential energy

Q#24:- Electrochemical energy is required for the working of

  1. Circulatory system
  2. Nervous system ( Right Answer)
  3. Excretory system
  4. Digestive system

Q#25:- A vector has a magnitude of 12. When its tail is at the origin it lies between the positive x

axis and the negative y axis and makes an angle of 30◦ with the x axis. Its y component is:

  1. 6/√3
  2. −6√3
  3. 6
  4. −6 ( Right Answer)
  5. 12

Q#26:- The hydraulic automobile jack illustrates:

  1. Archimedes’ principle
  2. Pascal’s principle ( Right Answer)
  3. Hooke’s law
  4. Newton’s third law
  5. Newton’s second law

Q#27:- What is the magnifying power of a convex lens of focal length 5 cm?

  • 3
  • 5
  • 6 ( Right Answer)
  • 20

Q#28:- Which portion of light has a wavelength in a range from 400 to 780 nm, with a frequency range of 405 to 790 Hz?

  • infrared light
  • visible light ( Right Answer)
  • ultra-violet light
  • none of the above

Q#29:- Candela is a unit of

  • acoustic intensity
  • electric intensity
  • luminous intensity ( Right Answer)
  • magnetic intensity

Q#30:- Which are different types of emission spectrum?

  • continuous spectrum
  • line spectrum
  • band spectrum
  • all of the above ( Right Answer)

PPSC Physics Subject specialist S S Past papers

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