Physics Solved MCQS Past Papers for KMU CAT Entry Test, Online Preparation for KMU CAT Test
Q.1 Name the quantity which can be measured by using base unit ‘kgm2s-3’
A) Weight C) Power
B) Pressure D) Work
Q.2 Ratio of moment of inertia of two objects ‘A’ and ‘B’ is 2:3. Which one of the following is the
ratio of torques of ‘A’ and ‘B’ respectively, if both are being rotated with constant angular
acceleration?
A) 3:4 C) 3:2
B) 2:3 D) 4:3
Q.3 Due to some mechanical fault, a lift falls freely from the top of a multistory building. Which of
the followings is the apparent weight of a man inside the lift, if mass of man is 80 kg while value
of ‘g’ is 10 ms-2?
A) 900 N C) 800 N
B) Zero D) 700 N
Q.4 Stokes’ Law is given as:
A) F = 6πηr2v C) F = 6πηrv-1
B) F = 6πηrv D) F = 6π2ηr3v
Q.5 The product of cross-sectional area of the pipe and the fluid speed at any point along the pipe:
A) Remains constant C) Exponentially increases
B) Is zero D) Exponentially decreases
Q.6 A small leak is developed in a large water storage tank. If the height of water above leakage is
10 m, then find the speed of efflux through the leak:
A) 14 m/sec C) 9.8 m/sec
B) 10 m/sec D) 20 m/sec
Q.7 The minimum distance from the eye at which an object can be seen clearly without strain is
called:
A) Focal point C) Yield point
B) Near point D) Far point
Q.8 In the diffraction of light around an obstacle, the angle of diffraction is increased then:
A) The wavelength of incident light wave is increased C) The amplitude of the incident light wave is increased B) The wavelength of incident light wave is decreased D) The amplitude of the incident light wave is decreased
Q.9 An object 15 cm from a lens produces a real image 30 cm from the lens. What is the focal length
of the lens?
A) +15 cm C) +10 cm
B) +20 cm D) +25 cm
Q.10 What is the charge stored on a 5 μF capacitor charged to potential difference of 12 V?
A) 60 μC C) 2.4 μC
B) 2.4 C D) 60 C
Q.11 Which of the following is the proper way to study the sinusoidal wave form of voltage?
A) Voltage is connected to ‘Y’ input and time base is switched on.
B) Voltage is connected to ‘X’ input and time base is switched off.
C) Voltage is connected to ‘Y’ input and time base is switched off.
D) Voltage is connected to ‘X’ input and time base is switched on.
Q.12 12-volt battery is applied across 6-ohm resistance to have a steady flow of current. What must
be the required potential difference across the same resistance to have a steady current of one
ampere?
A) 12 V C) 1 V
B) 6 V D) 3 V
Q.13 A solenoid is cut into two halves. Magnetic induction due to same current in each half will be:
A) Half of the original C) Same as original
B) Double of the original D) Four times of the original
Q.14 A long straight current carrying conductor has current directed from bottom to top when held
vertically. What will be the direction of magnetic field lines when observed from below the
conductor?
A) Clockwise C) Vertically upward
B) Anti clockwise D) Vertically downward
Q.15 X-rays from a given X-ray tube operating under specified conditions have a minimum
wavelength. The value of this minimum wavelength could be reduced by:
A) Cooling the target C) Increasing the potential difference between the cathode and the target
B) Reducing the temperature of the filament D) Reducing the pressure in the tube
Q.16 Helium-neon lasers are used for the:
A) Precise measurement of range finding C) Surveying for construction of tunnels
B) Optical fiber communication systems D) Welding detached bone of body
Q.17 What is the type of characteristic X-ray photon whose energy is given by relation
‘hf = EM – EK’?
A) K – alpha C) K – beta
B) M – alpha D) M – beta
Q.18 Kinetic energy of electrons by applying potential difference V1 across the x-ray tube is KE1 while
V2 potential difference produce kinetic energy equal to KE2. What will be the value of KE1:KE2 if
ratio of potential difference V1:V2 = 2:3?
A) 3:2 C) 9:4
B) 4:9 D) 2:3
Q.19 For what CAT stands in X-ray technology?
A) Capacitor Amplifier Transistor C) Cathode Anode Technique
B) Computerized Axial Tomography D) Current Amplification Technology
Q.20 During the production of LASER, when the excited state E2 contains more number of atoms than
the ground state E1, the state is known as:
A) Population inversion C) Excited state
B) Ground State D) Metastable state
Q.21 In cloud chamber the path of β-particles is:
A) Straight, thick, short C) Thin, wavy, longer
B) Thin, wavy, shorter D) Thin, straight, short
Q.22 Among the three types of radioactive radiation, which have strongest penetration power?
A) Alpha C) Beta
B) Gamma D) All have same penetration power
Q.23 Emission of alpha decay from a radioactive substance causes:
A) Decreases in ‘Z’ by 4 and decreases in ‘A’ by 2 C) Decreases in ‘Z’ by 1 and ‘A’ remains same
B) Decreases in ‘A’ by 1 and ‘Z’ remains same D) Decreases in ‘A’ by 4 and decreases in ‘Z’ by 2
Q.24 10 Joule of energy is absorbed by 10-gram mass from a radioactive source. What is the absorbed
dose?
A) 1 gray C) 10 gray
B) 1000 gray D) 100 gray
Q.25 Isotopes are those nuclei of an element that have:
A) Same mass number but different atomic number C) Different mass number as well as atomic number
B) Same mass number as well as atomic number D) same atomic number but different mass number