General Education Diploma (GED Oman) · Physics And Chemistry

Mechanics, Waves and Electromagnetism

31 practice questions, each with the answer and an explanation.

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A 0.5 kg object moves in a horizontal circular path of radius 2.0 m at a constant speed of 4.0 m/s. What is the centripetal force acting on the object?
Two point charges of +3.0 microcoulombs and +4.0 microcoulombs are separated by a distance of 0.30 m in a vacuum. Given Coulomb's constant k = 9.0 10^9 Nm^2/C^2, what is the repulsive force between…
A simple pendulum has a length of 0.98 m on Earth, where g = 9.8 m/s^2. What is its approximate period of oscillation?
A sound wave in air has a frequency of 680 Hz. If the speed of sound is 340 m/s, what is its wavelength?
What happens to the capacitance of a parallel plate capacitor if the separation distance between the plates is halved while plate area remains constant?
An ambulance with its siren emitting an 800 Hz tone moves toward a stationary observer at 34 m/s. If the speed of sound is 340 m/s, what frequency is heard by the observer?
A wire carrying a current of 5.0 A is placed perpendicular to a uniform magnetic field of 0.40 T. What is the magnetic force on a 0.50 m length of this wire?
According to Faraday's law of electromagnetic induction, what induces an electromotive force (EMF) in a closed conductive loop?
An ideal step-down transformer has 1200 turns in its primary coil and 120 turns in its secondary coil. If the primary voltage is 240 V AC, what is the secondary voltage?
A proton with charge 1.6 10^-19 C moves at 2.0 10^6 m/s perpendicular to a magnetic field of 0.50 T. What is the magnitude of the magnetic Lorentz force?
Two capacitors of 6.0 microfarads and 3.0 microfarads are connected in series across a DC power supply. What is the equivalent capacitance?
What is the orbital speed of a satellite orbiting Earth at distance r from the Earth's center, where M is Earth's mass and G is the gravitational constant?
In standing waves formed on a stretched string fixed at both ends, what is the distance between two consecutive displacement nodes?
What happens to the total resistance of an electric circuit when an additional resistor is connected in parallel with an existing resistor?
A light ray passes from crown glass (index of refraction n1 = 1.50) into water (n2 = 1.33). What is the critical angle for total internal reflection?
A mass of 2.0 kg attached to a spring oscillates with spring constant k = 200 N/m. What is the angular frequency omega of the oscillation?
Which of the following electromagnetic waves has the highest frequency and shortest wavelength in the electromagnetic spectrum?
In Lenz's law, the direction of an induced current is such that it:
A 100 W incandescent light bulb operates on a 200 V circuit. What is the electrical resistance of the bulb filament?
What is the kinetic energy of a 1200 kg car traveling at a velocity of 20 m/s?
When an electron drops from an excited state of n = 3 to the ground state of n = 1 in a hydrogen atom, what type of photon is emitted?
A convex lens has a focal length of 20 cm. If an object is placed 30 cm in front of the lens, at what distance from the lens will the image be formed?
Which law states that the total electric flux through any closed Gaussian surface is proportional to the enclosed net electric charge?
What is the work done on an ideal gas during an isobaric expansion from 0.02 m^3 to 0.05 m^3 at a constant pressure of 100,000 Pa?
What type of nuclear decay decreases the atomic number Z of a parent nucleus by 2 and decreases the mass number A by 4?
An AC voltage is described by V(t) = 311 sin(100 pi * t) volts. What is the root-mean-square (RMS) voltage of this AC source?
A 1,000 kg car rounds an unbanked circular curve of radius 50 m on a wet road where the static coefficient of friction is $μ_{s} = 0.20$ . What is the maximum speed the car can negotiate the curve with…
What is the equilibrium constant $K_{c}$ at $500 K$ for the reaction $2 N O_{2} (g) ⇌ N_{2} O_{4} (g)$ if an equilibrium mixture in a 2.0 L flask contains 0.40 mol $N O_{2}$ and 0.80 mol…
An ideal gas initially at $300 K$ and $1.0 \times 1 0^{5} Pa$ occupies a volume of $0.020 m^{3}$ . It undergoes adiabatic expansion to double its volume ( $0.040 m^{3}$ ). If…
A copper wire has a resistance of $5.0 Ω$ . It is stretched uniformly to three times its original length without changing its volume. What is its new resistance?
What volume of 0.200 M potassium permanganate ( $K M n O_{4}$ ) solution is required to completely oxidize 50.0 mL of 0.100 M iron(II) sulfate ( $F e S O_{4}$ ) in acidic medium? (…

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