University of Benin
PHY 102
Practice 523+ past questions for PHY 102 at University of Benin. Organized by topic with explanations. Free preview on Testwiz.
About PHY 102 at University of Benin
PHY 102 is a foundational physics course at the University of Benin (UNIBEN) that covers core topics in electricity, magnetism, and modern physics. The course includes electrostatics, Gauss's law, electric potential, capacitors and dielectrics, current electricity, Kirchhoff's rules, magnetic fields, alternating current circuits, electromagnetism, atomic structure, and nuclear physics. It is designed for undergraduate students in physics and related science or engineering programs.
Practicing past questions by topic helps you identify recurring concepts, understand the exam format, and build confidence in applying physics principles to problem-solving. Topic-based practice allows you to focus on weaker areas, reinforce key formulas, and improve speed and accuracy for the UNIBEN PHY 102 exam.
Topics covered
Sample questions
1. A conducting sphere of radius 3 m has a uniform charge distribution of 10 μC. What is the magnitude of the electric field at a point 1.5 m below the surface of the sphere?
2. Two point charges, +5 μC and -3 μC, are placed 20 cm and 50 cm respectively from a charge of -4 μC. What is the net electric force on the -4 μC charge? (k₀ = 9 × 10⁹ Nm²/C²)
3. A physicist surrounds a point charge of 5.0 μC with a sphere of radius 0.26 m centered on the charge. What is the electric flux through the sphere? (k₀ = 9 × 10⁹ Nm²/C², π = 3.142)
4. A negative point charge of 4.8 μC is surrounded by a spherical Gaussian surface of radius 0.55 m centered on the charge. What is the magnitude of the electric field on the surface? (k₀ = 9 × 10⁹ Nm²/C²)
5. Two point charges of +8 μC and -5 μC are placed 10 cm apart. What is the work done by an external agent in moving the -5 μC charge 4 cm closer to the +8 μC charge? (k₀ = 9 × 10⁹ Nm²/C²)
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Get started freeFrequently asked questions
What is the difference between electric potential and electric potential energy?
Electric potential (V) is the electric potential energy per unit charge at a point in an electric field, measured in volts. Electric potential energy (U) is the energy a charge has due to its position in an electric field, measured in joules. The relationship is U = qV, where q is the charge.
How do I apply Gauss's law to find the electric field of a charged sphere?
Gauss's law states that the electric flux through a closed surface equals the enclosed charge divided by the permittivity of free space (ε₀). For a uniformly charged sphere, choose a spherical Gaussian surface concentric with the sphere. Inside the sphere (r < R), the field increases linearly with r; outside (r > R), the field behaves like a point charge at the center: E = Q/(4πε₀r²).
What are Kirchhoff's rules and how are they used in circuit analysis?
Kirchhoff's rules are two laws for analyzing circuits: (1) The junction rule states that the sum of currents entering a junction equals the sum leaving it (conservation of charge). (2) The loop rule states that the sum of potential differences around any closed loop is zero (conservation of energy). They are used to set up equations for unknown currents in complex circuits.