POST UTME MADONNA UNIVERSITY 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A heat engine operates between the temperatures of 500 K and 300 K. If the engine absorbs 1000 J of heat energy from the high-temperature reservoir, what is the efficiency of the engine?
A. 0.25
B. 0.30
C. 0.35
D. 0.40
Question 2
A 2 kg block is susp\ended from a spring with a spring cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released, what is the maximum speed of the block?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 3
A light source is placed 2 m away from a convex lens with a focal length of 0.5 m. What is the image dis\tance?
A. 1 m
B. 2 m
C. 3 m
D. 4 m
Question 4
A particle of mass 2 kg is moving in a circular path of radius 3 m with a speed of 4 m/s. What is the magnitude of its angular momentum?
A. 12 kg m^2/s
B. 24 kg m^2/s
C. 48 kg m^2/s
D. 96 kg m^2/s
Question 5
A simple p\endulum of length 1 m is released from rest at an angle of 30° from the vertical. If the p\endulum is released at a location where the acceleration due to gravity is 9.8 m/s^2, what is the time period of the p\endulum?
A. 2 s
B. 3 s
C. 4 s
D. 5 s
Question 6
A radioactive sample has a half-life of 5 years. If the initial activity is 100 Bq, what is the activity after 10 years?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 7
A ray of light passes from air into a glass block with a re\fractive index of 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 20°
B. 30°
C. 40°
D. 50°
Question 8
A charged particle of mass $m$ and charge $q$ is moving in a straight line with speed $v$ in a uniform electric field $E$. If the particle's initial velocity is $v_i$, what is its final velocity?
A. v_i + qE\Delta t
B. v_i - qE\Delta t
C. \frac{v_i}{qE\Delta t}
D. \frac{qE\Delta t}{v_i}
Question 9
A nucleus of mass number 238 and atomic number 92 undergoes \alpha decay. What is the mass number of the daughter nucleus?
A. 234
B. 236
C. 238
D. 240
Question 10
A nucleus of mass number 20 has a binding energy of 150 MeV. Calculate the binding energy per nucleon.
A. 7.5 MeV
B. 10 MeV
C. 12.5 MeV
D. 15 MeV
Question 11
A sound wave with frequency $f$ is emitted by a source and travels through a medium with speed $v$. If the wave is reflected off a stationary surface, what is the frequency of the reflected wave?
A. f
B. 2f
C. \frac{v}{2f}
D. \frac{f}{v}
Question 12
A magnetic field of 0.5 T is applied to a wire of length 2 m and cross-sectional area 0.01 m^2. The wire carries a current of 5 A. Calculate the force experienced by the wire.
A. 0.25 N
B. 0.5 N
C. 1 N
D. 2 N
Question 13
A parallel plate capacitor consists of two plates, each of area 0.04 m^2, separated by a dis\tance of 0.02 m. The capacitor is charged to a potential difference of 10 V. Calculate the capaci\tance of the capacitor.
A. 1.25 x 10^-10 F
B. 2.5 x 10^-10 F
C. 5 x 10^-10 F
D. 10 x 10^-10 F
Question 14
A gas is confined to a cylinder of volume 2 m^3 at a temperature of 300 K. If the gas is heated to a temperature of 400 K, what is the new volume of the gas?
A. 2.5 m^3
B. 3 m^3
C. 3.5 m^3
D. 4 m^3
Question 15
A magnetic field of 0.5 T is applied to a current-carrying wire of length 2 m. If the current in the wire is 5 A, what is the force experienced by the wire?
A. 0.25 N
B. 0.50 N
C. 0.75 N
D. 1.0 N

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