POST UTME KSU 2025 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 subject to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?
A. 8 m/s^2
B. 12 m/s^2
C. 16 m/s^2
D. 20 m/s^2
Question 2
A resistor of resis\tance 10 ohms is connected in series with a capacitor of capaci\tance 10^-6 F. If an alternating current of frequency 100 Hz is applied across the circuit, what is the impedance of the circuit?
A. 10 ohms
B. 20 ohms
C. 30 ohms
D. 40 ohms
Question 3
A particle of mass $m$ and charge $q$ is moving in a circular path of radius $r$ in a uniform magnetic field of strength $B$. If the particle's speed is $v$, what is the magnitude of the magnetic field?
A. B = \frac{mv}{qr}
B. B = \frac{q}{mr}
C. B = \frac{r}{mv}
D. B = \frac{mv}{qr}
Question 4
A circuit consists of a resistor of 10 Ω and an inductor of 5 H in series. If the voltage source is 20 V, what is the current in the circuit?
A. I = 0.5 A
B. I = 1 A
C. I = 2 A
D. I = 5 A
Question 5
A radioactive sample decays at a rate of 10^-6 per second. If the initial number of atoms in the sample is 10^20, what is the number of atoms remaining after 10 seconds?
A. 10^19
B. 10^18
C. 10^17
D. 10^16
Question 6
A particle of mass 2 kg is moving in a circular path of radius 5 m with a speed of 10 m/s. What is the magnitude of the centripetal force?
A. F_c = 10 N
B. F_c = 20 N
C. F_c = 50 N
D. F_c = 100 N
Question 7
A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the capaci\tance of the capacitor is 10^-6 F, what is the charge stored on the capacitor when a potential difference of 10 V is applied across it?
A. 10^-5 C
B. 10^-6 C
C. 10^-7 C
D. 10^-8 C
Question 8
A wave has a frequency of 100 Hz and a wavelength of 0.2 m. What is the speed of the wave?
A. v = 20 m/s
B. v = 100 m/s
C. v = 200 m/s
D. v = 500 m/s
Question 9
A wave has a frequency of 50 Hz and a wavelength of 0.5 m. What is the speed of the wave?
A. v = 25 m/s
B. v = 50 m/s
C. v = 100 m/s
D. v = 200 m/s
Question 10
A wave of frequency 100 Hz and amplitude 0.1 m is traveling through a medium with a speed of 300 m/s. If the wave is reflected from a fixed \end, what is the amplitude of the reflected wave?
A. 0.1 m
B. 0.05 m
C. 0.01 m
D. 0 m

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