Mdcat Physics Mcqs Flashcards
What is the unit of force in the International System of Units (SI)?
Newton
True or False: The acceleration due to gravity on Earth is approximately 9.8 m/s².
True
Fill in the blank: The formula for calculating kinetic energy is _____.
KE = 1/2 mv²
What is the principle of conservation of energy?
Energy cannot be created or destroyed, only transformed.
Which of the following quantities is a vector? A) Mass B) Temperature C) Velocity D) Energy
C) Velocity
What is the formula for calculating potential energy?
PE = mgh
True or False: The total mechanical energy is the sum of kinetic and potential energy.
True
What does the term ‘work’ refer to in physics?
Work is done when a force causes displacement.
Fill in the blank: The unit of power is _____.
Watt
What is the formula for calculating gravitational force between two masses?
F = G(m₁m₂/r²)
Which law states that for every action, there is an equal and opposite reaction?
Newton’s Third Law of Motion
What is the definition of frequency?
Frequency is the number of cycles per unit time.
Which of the following increases with increasing temperature: A) Density B) Volume C) Mass D) Pressure
B) Volume
True or False: Sound travels faster in air than in water.
False
What is the formula for calculating the period of a pendulum?
T = 2π√(L/g)
Fill in the blank: The speed of light in a vacuum is approximately _____ m/s.
3 x 10^8
What is the principle of superposition in waves?
The principle that the resultant displacement is the sum of the displacements of individual waves.
Which type of wave requires a medium to travel: A) Electromagnetic waves B) Sound waves C) Both A and B D) None of the above
B) Sound waves
What is the formula for Ohm’s Law?
V = IR
True or False: In a closed circuit, the total current entering a junction equals the total current leaving.
True
What is the difference between speed and velocity?
Speed is a scalar quantity, while velocity is a vector quantity.
Fill in the blank: The law of reflection states that the angle of incidence is equal to the angle of _____.
Reflection
What is the principle of conservation of momentum?
In a closed system, the total momentum before an event is equal to the total momentum after the event.
Which of the following is a type of potential energy? A) Thermal energy B) Chemical energy C) Kinetic energy D) All of the above
B) Chemical energy
What is the SI unit of electric charge?
Coulomb
True or False: The frequency of a wave is inversely proportional to its wavelength.
True
