General physics- Knowledge test

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General physics- Knowledge test

Question 1 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Siphon will fail to work if
A
the densities of the liquid in the two vessels are equal
B
the level of the liquid in the two vessels are at the same height
C
both its limbs are of unequal length
D
the temperature of the liquids in the two vessels are the same
Question 2 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Supersonic plane fly with the speed
A
less than the speed of sound
B
of sound
C
greater than the speed of sound
D
of light
Question 3 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Suitable impurities are added to a semiconductor depending on its use. This is done in order to
A
increase its life
B
enable it to withstand higher voltages
C
increase its electrical conductivity
D
increase its electrical resistivity
Question 4 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
A
Pressure and Young's modules
B
Planck's constant and Angular momentum
C
Impulse and moment of force
D
Force and rate of change of linear momentum
Question 5 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Out of the following pairs, which one does not have identical dimension?
A
Moment of inertia and moment of a force
B
Work and Torque
C
Angular momentum and Planck's constant
D
Impulse and Momentum
There are 5 questions to complete.