IRSA IMPORTANT QUESTIONS Flashcards
What does Newton’s first law of motion state? What is it also known as?
Newton’s first law states that an object at rest will remain at rest while an object moving will continue to do so unless acted upon by an external force. First law of motion is also called law of inertia
Define and list the equation for angular acceleration?
Angular acceleration acts towards the centre of the circle and is given by a_R=𝒗^𝟐/r
What direction is force, acceleration and velocity acting in circular motion?
In circular motion, centripetal acceleration and velocity are always at Right angles to one another.
What is amplitude?
Amplitude is the maximum displacement from the equilibrium position of an oscillating object.
What does the first law of thermodynamics state?
Energy cannot be created or destroyed, only transferred or converted from one form to another.
What is a magnetic flux? What does it represent in terms of magnetic fields?
Magnetic flux is ameasure of the flow of a magnetic field through a given area
The number of magnetic field lines passing through a surface.
What does Gauss’s Law for magnetism state?
the magnetic flux through a closed surface is always zero
What device is used to measure electromagnetic induction?
Galvanometer
How does AC differ from DC
AC continuously changes direction, while DC flows steadily in one direction. AC is categorized by a waveform that alternates, whereas DC has a constant, unidirectional flow.
What is the frequency of AC in most households?
In most households, the AC frequency is 60 hertz (Hz) in North America and 50 Hz in many other parts of the world. It represents the number of complete cycles per second
How is the strength of a gravitational field determined?
The strength of a gravitational field is determined by the mass of the object creating the field. The greater the mass, the stronger the gravitational field.
How does an electromagnet work?
An electromagnet is a coil of wire with an electric current flowing through it. It generates a magnetic field when the current flows, and you can control the strength and direction of the field by adjusting the current.
What is the unit of measurement for electric field strength?
The unit of measurement for electric field strength is volts per meter (V/m).
What is the ideal gas law?
State the equation.
The ideal gas law is an equation that describes the behaviour of an ideal gas. It is typically written as PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature in Kelvin.
How does an increase in pressure affect the volume of a gas, assuming constant temperature and moles?
According to Boyle’s law, an increase in pressure, with constant temperature and moles, will result in a decrease in the volume of a gas, and vice versa.