POST UTME CRAWFORD UNIVERSITY 2018 Physics | Objective
Practice these randomly selected questions to test your readiness.
Question 1
A $50 , Omega$ resistor is connected in parallel with a $20 , Omega$ resistor. Calculate the equivalent resis\tance of the circuit.
Question 2
A particle of mass $2 , \text{kg}$ is moving with a velocity of $5 , \text{m} , \text{s}^{-1}$. Calculate the kinetic energy of the particle.
Question 3
A gas at $25^circ$C and $1.0 \times 10^5$ Pa expands to occupy a volume of $2.5 , \text{m}^3$. Calculate the number of moles of gas present, given that the gas cons\tant $R = 8.314 , \text{J} , \text{mol}^{-1} , \text{K}^{-1}$.
Question 4
A 2 kg block of wood 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, calculate the potential energy stored in the spring.
Question 5
A capacitor consists of two parallel plates, each of area 0.04 m², separated by a dis\tance of 0.02 m. If the capaci\tance of the capacitor is 8 µF, what is the charge stored on the capacitor when a potential difference of 12 V is applied across it?
Question 6
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 particle is subjected to a centripetal acceleration of 2 m/s², what is the magnitude of the force acting on the particle?
Question 7
A wave has a frequency of 50 Hz and a wavelength of 10 m. What is the speed of the wave?
Question 8
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. It is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the total energy of the particle at the ins\tant it passes through the equilibrium position.
Question 9
A block of mass 5 kg is placed on a frictionless surface and is connected to a spring with a spring cons\tant of 100 N/m. If the block is displaced by 2 m from its equilibrium position and released, what is the maximum speed of the block?
Question 10
A 5 kg block is moving at 2 m/s on a frictionless surface. What is its kinetic energy?
Question 11
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 100 V. If the dis\tance between the plates is doubled, what is the new capaci\tance?
Question 12
A 10.0 g sample of a radioactive subs\tance decays to 5.0 g in 10 days. Determine the half-life of the subs\tance.
Question 13
A vector µ has a magnitude of 5 m and makes an angle of 30° with the positive x-axis. If a vector ¶ has a magnitude of 3 m and makes an angle of 60° with the positive x-axis, what is the magnitude of the resul\tant vector µ + ¶?
Question 14
A 5.0 kg block is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 0.25 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, determine the maximum speed of the block as it passes through the equilibrium position.
Question 15
A 2 kg block of copper is heated from 20°C to 80°C. If the specific heat capacity of copper is 0.385 J/g°C, calculate the energy required to heat the block.
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