POST UTME CRAWFORD UNIVERSITY 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A point charge of 2 μC is placed at the center of a hollow, conducting sphere of radius 0.1 m. What is the electric flux through the sphere?
A. 0 Nm^2/C
B. 2π × 10^-9 Nm^2/C
C. 4π × 10^-9 Nm^2/C
D. 6π × 10^-9 Nm^2/C
Question 2
A wave has a frequency of 100 Hz and a wavelength of 0.1 m. Calculate the speed of the wave.
A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s
Question 3
A particle of mass 2 kg is moving in a circular path of radius 3 m with a cons\tant speed of 4 m/s. If the magnetic field strength is 2 T, what is the magnitude of the magnetic force acting on the particle?
A. 8 N
B. 12 N
C. 16 N
D. 20 N
Question 4
A gas occupies a volume of 2.5 m^3 at a pressure of 1.5 atm. What is the temperature of the gas in Kelvin?
A. 300 K
B. 400 K
C. 500 K
D. 600 K
Question 5
A 5 kg block is moving with a velocity of 2 m/s on a frictionless surface. A force of 10 N is applied to the block in the direction of motion. What is the acceleration of the block?
A. 0.5 m/s^2
B. 1.0 m/s^2
C. 2.0 m/s^2
D. 5.0 m/s^2
Question 6
A particle of mass 1.0 kg is confined to a one-dimensional box of length 0.10 m. What is the energy of the ground state?
A. 1.0 x 10¹ J
B. 2.0 x 10¹ J
C. 3.0 x 10¹ J
D. 4.0 x 10¹ J
Question 7
A radioactive sample of Δₗ emits Δₗα particles with a half-life of 5.3 days. If the initial activity is 1.0 Ci, what is the activity after 10 days?
A. 0.25 Ci
B. 0.5 Ci
C. 0.75 Ci
D. 1.0 Ci
Question 8
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 2 atm, what is the final pressure?
A. 2.5 atm
B. 3 atm
C. 4 atm
D. 5 atm
Question 9
A liquid of density 1000 kg/m^3 is flowing through a horizontal pipe of radius 0.05 m. If the pressure difference between the two \ends of the pipe is 1000 Pa, what is the velocity of the liquid?
A. 0.5 m/s
B. 1 m/s
C. 2 m/s
D. 5 m/s
Question 10
A light ray passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 20°
B. 30°
C. 40°
D. 50°
Question 11
A 1000 W heater is connected to a 230 V AC supply. What is the current drawn by the heater?
A. 0.5 A
B. 1.0 A
C. 2.0 A
D. 4.0 A
Question 12
A nucleus of mass number 238 has an atomic number of 92. What is the number of protons and neutrons in the nucleus?
A. 92 protons, 146 neutrons
B. 146 protons, 92 neutrons
C. 92 protons, 146 neutrons
D. 146 protons, 92 neutrons
Question 13
A 2 kg block is moving with a velocity of 3 m/s on a frictionless surface. A force of 15 N is applied to the block in the direction of motion. What is the acceleration of the block?
A. 1.5 m/s^2
B. 2.0 m/s^2
C. 3.0 m/s^2
D. 4.5 m/s^2
Question 14
A 1000 Hz AC voltage source is connected to a 50 Ω resistor in series with a 10 μF capacitor. The circuit is driven by a \sinusoidal voltage source with a peak value of 10 V. What is the magnitude of the current in the circuit at 50 Hz?
A. 0.2 A
B. 0.5 A
C. 1.0 A
D. 2.0 A
Question 15
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 2.5 x 10^-10 F, what is the dielectric cons\tant of the material between the plates?
A. 1.25
B. 1.5
C. 2.0
D. 2.5

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