Physics - Online Test
Q1. A photon is
Answer : Option C
Explaination / Solution:
Photon is the small packet of light energy. The photon has zero rest mass and moves with the speed of light.
Q2. Amplification is the
Answer : Option C
Explaination / Solution:
It is the process of increasing the amplitude and hence the strength of an elctrical signal by using an electric circuit having atleat on transistor is called amplifier.Amplification is rerquired to compensate for the loss of strenght of a signal during its transmission.The additional energy is otianed from a dc source.The process of amplification is done at a location betwen the sources and the destination where the strength of signal becomes weaker than the required level.
Q3. Which of the following physical quantities a vector?
Answer : Option B
Explaination / Solution:
Angular momentum is a vector quantity (more precisely, a pseudovector) that represents the product of a body's rotational inertia and rotational velocity about a particular axis.
Q4. S.I unit of power is
Answer : Option D
Explaination / Solution:
The SI unit of power, equivalent to one joule per second, corresponding to the rate of consumption of energy (Work done).
Q5. The direction of an electric dipole
Answer : Option C
Explaination / Solution:
Dipole Moment— It is a vector quantity and is directed from negative charge to positive charge along the axis. It is denoted as and is defined as the product of the magnitude of either of the charge and the dipole length i.e.
Q6. Bulk modulus is
Answer : Option D
Explaination / Solution:
No Explaination.
Q7. A refrigerator's working substance
Answer : Option D
Explaination / Solution:
No Explaination.
Q8. Fluorescence is
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. Which of the following is not a synonym of axiom
Answer : Option C
Explaination / Solution:
An axiom or postulate is a statement/assumption that is taken to be true, to serve as a premise or starting or base point for further reasoning and arguments.
Q10. The centripetal force required for circular motion of a car such as taking a sharp turn is provided by
Answer : Option C
Explaination / Solution:
it is the force of friction that acts between tyres and road.
