Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
For a pear-shaped conductor shown above, the concentration of charge on the outside is highest at?
X
Z
Y
K
Correct answer is A
The electric field at the surface of the conductor is perpendicular to the surface.
Charge accumulates, and the field is strongest, on pointy parts of the conductor.
According to kinetic molecular model in gases,
the particles are closely packed together; they occupy minimum space are usually arranged in a regular pattern
the particles vibrate about fixed positions and are held together by the strong intermolecular bonds between them
the molecules are very far apart and occupy all the spaces made available to them
the particles occur in clusters with molecules slightly further apart
Correct answer is C
The model, called the kinetic theory of gases, assumes that the molecules are very small relative to the distance between molecules.
The molecules are in constant, random motion and frequently collide with each other and with the walls of any container.
A magnet relay is a device used for?
reading the magnitude of magnetic flux
controlling another circuit carrying larger current
turning in sports
storing magnetic field
Correct answer is B
Relays are electrically operated switches that open and close the circuits by receiving electrical signals from outside sources.
When the plate area of a capacitor increases?
the voltage can withstand increase
the capacitance decreases
the capacitance is unaffected
the capacitance increases
Correct answer is D
Therefore, as the area of the plates increase, capacitance increases.