PHYS Straighterline Questions and Answers | Latest Version | 2024/2025 | 100% Verified
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PHYS Straighterline
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PHYS Straighterline
PHYS Straighterline Questions and
Answers | Latest Version | 2024/2025 |
100% Verified
What is Ohm's Law and how is it expressed?
Ohm's Law states that the current through a conductor between two points is directly
proportional to the voltage across the two points and is given by ( V = ...
PHYS Straighterline Questions and
Answers | Latest Version | 2024/2025 |
100% Verified
What is Ohm's Law and how is it expressed?
✔✔ Ohm's Law states that the current through a conductor between two points is directly
proportional to the voltage across the two points and is given by \( V = IR \), where \( V \) is
voltage, \( I \) is current, and \( R \) is resistance.
What is the difference between elastic and inelastic collisions?
✔✔ In elastic collisions, total kinetic energy is conserved, while in inelastic collisions, kinetic
energy is not conserved, though momentum is.
What does the term "momentum" refer to in physics?
✔✔ Momentum refers to the quantity of motion an object has and is calculated using \( p = mv
\), where \( p \) is momentum, \( m \) is mass, and \( v \) is velocity.
1
,What is the definition of frequency in terms of waves?
✔✔ Frequency is the number of wave cycles that pass a given point per unit of time and is
measured in Hertz (Hz).
How does the law of conservation of momentum apply in a closed system?
✔✔ The total momentum of a closed system remains constant if no external forces are acting on
it.
What is the difference between scalar and vector quantities?
✔✔ Scalar quantities have magnitude only, such as temperature, while vector quantities have
both magnitude and direction, such as velocity.
What is Newton's First Law of Motion?
✔✔ An object will remain at rest or in uniform motion unless acted upon by an external force.
2
,What is the difference between speed and velocity?
✔✔ Speed is the rate at which an object moves, while velocity includes both speed and direction.
How does acceleration relate to force and mass?
✔✔ Acceleration is directly proportional to force and inversely proportional to mass.
How does the principle of conservation of energy apply to a closed system?
✔✔ In a closed system, the total energy remains constant, meaning energy cannot be created or
destroyed, only transferred or transformed.
What is the difference between potential and kinetic energy?
✔✔ Potential energy is stored energy due to an object's position, while kinetic energy is the
energy of motion.
3
, What happens to the pressure of a gas when its volume decreases, assuming temperature remains
constant?
✔✔ The pressure of the gas increases as its volume decreases, according to Boyle's law.
How is work defined in physics?
✔✔ Work is done when a force is applied to an object, causing it to move a certain distance in
the direction of the force.
What is the relationship between frequency and wavelength in a wave?
✔✔ Frequency and wavelength are inversely related; as the frequency increases, the wavelength
decreases.
How do electric charges interact with each other?
✔✔ Like charges repel each other, while opposite charges attract.
4
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