POST UTME SKYLINE UNIVERSITY 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A simple harmonic motion has a maximum displacement of 2 m and a frequency of 3 Hz. If the amplitude of the motion is doubled, what is the new frequency of the motion?
A. 1.5 Hz
B. 2.5 Hz
C. 3.5 Hz
D. 4.5 Hz
Question 2
A gas is contained in a cylinder of volume 2 L at a pressure of 1 atm. If the temperature is increased by 10°C, what is the new pressure?
A. 1.1 atm
B. 1.2 atm
C. 1.3 atm
D. 1.4 atm
Question 3
A 100 W bulb is connected to a 220 V power supply. What is the current flowing through the bulb?
A. 0.45 A
B. 0.5 A
C. 0.55 A
D. 0.6 A
Question 4
A magnetic field of 0.5 T is applied to a current-carrying wire of length 2 m. If the current is 5 A, what is the force experienced by the wire?
A. 0.5 N
B. 1 N
C. 2 N
D. 5 N
Question 5
A 10 μF capacitor is connected in series with a 20 Ω resistor and a 5 V battery. What is the current flowing through the circuit?
A. 0.25 A
B. 0.5 A
C. 1 A
D. 2 A
Question 6
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 1.2 atm and the final pressure is 2.5 atm, what is the value of the gas cons\tant R?
A. 8.314 J/mol·K
B. 1.38 × 10^\( -23 \) J/K
C. 0.082 L·atm/mol·K
D. 8.314 × 10^7 erg/mol·K
Question 7
A block of mass 5 kg is moving with a speed of 10 m/s on a frictionless surface. If the block is subjected to a cons\tant force of 20 N, what is the acceleration of the block?
A. 0.5 m/s^2
B. 1.0 m/s^2
C. 1.5 m/s^2
D. 2.0 m/s^2
Question 8
A particle of mass 2 kg is attached to a spring with spring cons\tant 100 N/m. If the particle is displaced by 0.2 m from its equilibrium position and released from rest, what is the maximum speed of the particle?
A. 0.2 m/s
B. 0.4 m/s
C. 0.6 m/s
D. 0.8 m/s
Question 9
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/s^2, what is the magnitude of the net force acting on the particle?
A. 10 N
B. 12 N
C. 15 N
D. 20 N
Question 10
A resistor of 10 Ω is connected in series with a resistor of 20 Ω. What is the equivalent resis\tance of the circuit?
A. 10 Ω
B. 20 Ω
C. 30 Ω
D. 40 Ω
Question 11
A block of mass 5 kg is attached to a horizontal spring with a force 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. 0.5 m/s
B. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s
Question 12
A particle of mass $m$ is moving in a circular orbit of radius $r$ with a speed $v$. If the particle is subject to a centripetal force $F_c$, calculate the magnitude of $F_c$ in terms of $m$, $r$, and $v$.
A. \( F_c = \frac{mv^2}{r} \)
B. \( F_c = \frac{mr^2}{v} \)
C. \( F_c = \frac{rv^2}{m} \)
D. \( F_c = \frac{mv}{r^2} \)
Question 13
A radioactive sample has a half-life of 5 years. If the initial activity of the sample is 100 Bq, what is the activity of the sample after 10 years?
A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq
Question 14
A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in parallel. If a voltage of 50 V is applied across the circuit, what is the current flowing through the 10 Ω resistor?
A. 0.5 A
B. 1.0 A
C. 1.5 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 8.0 nF, what is the charge stored when the potential difference between the plates is 50 V?
A. 0.04 C
B. 0.08 C
C. 0.16 C
D. 0.32 C

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