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.
In the molecular explanation of conduction, heat is transferred by the
In the molecular explanation of conduction, heat is transferred by the
Free atoms
Free molecules
Free solids
Correct answer is A
- Conduction is explained in terms of the free electrons.
- Convention is explained in terms of the movement of the fluid involved.
- Radiation is explained in terms of invisible electromagnetic wave
I only
I & II only
I & III only
II & III only
Correct answer is C
I & III only as units are independent of energy equation.
the heat energy is quickly conducted away
the heat capacity has become very large as the substance melts
the heat gained is equal to the heat lost by the substance
all the heat is used to break the bonds holding the molecules of the solid together
Correct answer is D
During the transformation of matter from the solid to the liquid state, the heat supplied does not produce a temperature increase because all the heat is used to break the bonds holding the molecules of the solid together
I only
II only
III only
I & IV only
Correct answer is B
- Friction depends on the nature of the surfaces in contact
An alternating current can induce voltage because it has
ripple value
varying magnetic field
weaker magnetic field than direct current
high peak value
Correct answer is B
As induced voltage is produced by varying magnetic field. The induced voltage is proportional to the rate of change of magnetic flux linking the coil.