A vector quantity can only be completely described when ……… and …………are mentioned.
Magnitude and motion
Magnitude and direction
Distance and specified displacement
Moment and momentum
Correct answer is B
A vector quantity has both magnitude and direction
There is an explanation video available below.
The resultant force of a couple is ………?
Infinity
Zero
One
Half
Correct answer is B
Note: moment of a couple = force × length (fL)
The tangential force is actingin an opposite direction alongside its length
i.e f1 L1 = f2L2
f2L2 − f1 L1 = 0(i.e Zero)
There is an explanation video available below.
The general gas law can be written as
PV ÷ T = a constant
PV = a constant
v/t = a constant
p/T = a constant
Correct answer is A
Formula for general gas law
V × 1/T × P
N [(PV) ÷ T] = K is constant
There is an explanation video available below.
I only
I and IV only
II only
III only
Correct answer is B
In an inelastic collision, linear momentum is conserved and energy is decreased
Momentum and kinetic energy are conserved in elastic collision
There is an explanation video available below.
A stroboscope can be used to make the wave appear ………….
Stationary
In motion
Dipper
Ripple
Correct answer is A
Stroboscope is a scientific instrument used to make a wave appears stationary when used
There is an explanation video available below.