POST UTME BABCOCK UNIVERSITY 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
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 uniform magnetic field of 2 T, what is the magnitude of the magnetic force acting on the particle?
A. 8 N
B. 16 N
C. 32 N
D. 64 N
Question 2
A point charge of 2 μC is placed at the origin. Calculate the electric potential at a point 1 m away from the charge.
A. 1000 V
B. 2000 V
C. 3000 V
D. 4000 V
Question 3
A radioactive sample decays from an initial activity of 100 Bq to a final activity of 50 Bq in 2 hours. What is the half-life of the sample?
A. 1 hour
B. 2 hours
C. 4 hours
D. 6 hours
Question 4
A wave has a frequency of 50 Hz and a wavelength of 0.5 m. Calculate the speed of the wave.
A. 25 m/s
B. 50 m/s
C. 10 m/s
D. 75 m/s
Question 5
A block of mass 5 kg is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 2 m from its equilibrium position and released from rest. 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 6
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. What is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 7
A capacitor has a capaci\tance of 10 μF and is connected to a 12 V battery. What is the charge $Q$ stored on the capacitor?
A. 120 μC
B. 240 μC
C. 360 μC
D. 480 μC
Question 8
A 2 kg block is moving at 4 m/s on a frictionless surface. If a force of 10 N is applied to the block, what is its acceleration?
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2
Question 9
A capacitor of capaci\tance $10\mu F$ is charged to a potential difference of $10\,V$. If the capacitor is then connected to a resistor of resis\tance $20\Omega$, what is the time cons\tant of the circuit?
A. 0.5\,s
B. 1\,s
C. 2\,s
D. 5\,s
Question 10
A particle of mass $m$ is moving in a circular path of radius $r$ with a cons\tant speed $v$. The particle is subject to a centripetal force $F_c = \frac{mv^2}{r}$. If the particle's speed is doubled to $2v$, what is the new centripetal force $F_{c,new}$?
A. 4mv^2/r
B. 2mv^2/r
C. mv^2/r
D. mv^2/2r
Question 11
A block of mass 5 kg is susp\ended from a spring with spring cons\tant 200 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 12
A particle of mass 3 kg is moving in a circular path of radius 4 m with a cons\tant speed of 5 m/s. If the particle is subjected to a uniform magnetic field of 3 T, what is the magnitude of the magnetic force acting on the particle?
A. 12 N
B. 24 N
C. 48 N
D. 96 N
Question 13
A 100 Ω resistor is connected in parallel with a 200 Ω resistor. What is the equivalent resis\tance of the circuit?
A. 50 Ω
B. 100 Ω
C. 150 Ω
D. 200 Ω
Question 14
A block of mass 5 kg is placed on a frictionless surface and attached to a horizontal spring with a force cons\tant of 200 N/m. If the block is displaced by 0.2 m from its equilibrium position and released from rest, 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 15
A sound wave has a frequency of 200 Hz and a speed of 340 m/s. What is the wavelength $\lambda$ of the wave?
A. 1.7 m
B. 1.8 m
C. 1.9 m
D. 2.0 m

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