Initial Assessment Test - Physics

A body is thrown vertically upwards with an initial velocity v​. What will be the velocity of the body at its maximum height?

• v

• 0

• −v

• v/2

Newton's second law (the fundamental principle of dynamics) is expressed by the relation:

• F=m⋅a

• F=m⋅v

• p=m⋅v

• L=I⋅ω

The period of a simple gravitational pendulum depends on

• ​Only ​g

• Amplitude

• Length

• Length and g

Ohm's law states that the electric current through a conductor is directly proportional to the:

• resistance between two points.

• voltage across the two points.

• power dissipated by the conductor.

• charge passing through the conductor.

The phenomenon of light interference demonstrates the:

• Corpuscular nature of light

• Wave nature of light

• Electromagnetic nature of light

• Quantum nature of light

The change in the kinetic energy of a point mass is equal to:

• the mechanical work of the friction force

• the mechanical work of gravity

• the total mechanical work of the forces acting upon it

• the potential energy

The total momentum of an isolated system of bodies is conserved in the case of:

• any interaction

• inelastic collisions

• elastic collisions

• all collisions and interactions, if the system is isolated

The relationship between wavelength (λ), frequency (f), and the propagation speed (v) of a wave is:

• v=λ⋅f

• λ=v⋅f

• f =v⋅λ

• v=λ/f

The phenomenon of waves bending around obstacles, when the dimensions of the obstacles are comparable to the wavelength, is called:

• refraction

• reflection

• interference

• diffraction

What is the primary function of a capacitor in an electrical circuit?

• To resist the flow of current.

• To store electrical energy in an electric field.

• To induce a magnetic field.

• To provide a constant voltage source.