General Knowledge - Physics - Discussion
Discussion Forum : Physics - Section 1 (Q.No. 15)
15.
Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
Discussion:
21 comments Page 2 of 3.
Mohan said:
1 decade ago
B also could be right.
Pressure = Force/Area,
Stress = Force/Area,
Young's modulus = Stress/Strain,
Strain has no units.
So, Pressure and Young's modulus have same dimensions.
Please correct me if I am wrong.
Pressure = Force/Area,
Stress = Force/Area,
Young's modulus = Stress/Strain,
Strain has no units.
So, Pressure and Young's modulus have same dimensions.
Please correct me if I am wrong.
Getnet Tegenie said:
1 decade ago
You are correct, but you didn't agree with your idea. Young's modulus has the same unit with stress or pressure. So the answer is only choice C which has quantities with different dimensions. The rest all choices have the same dimensions.
Odegbo michael said:
10 years ago
Distinguish between impulses and momentum and how they are related?
Mohammad Afzal said:
10 years ago
@Mohan: Force = MLT^-2 and Pressure = Force/area = (MLT^-2)/(L^2).
Hence, Pressure = ML^-1T^-2.
Whereas,
Young's Modulus = Pressure/Length = ML^-2T^-2.
Hence, Pressure = ML^-1T^-2.
Whereas,
Young's Modulus = Pressure/Length = ML^-2T^-2.
Paul said:
9 years ago
From Bohr theory, Angular momentum is equal to plank constant, ie L=nh where n= 1, 2, 3.
Also Angular momentum L = n * Dirac constant divided by 2 pie. Option C is the correct answer.
Also Angular momentum L = n * Dirac constant divided by 2 pie. Option C is the correct answer.
Sneha mandal said:
9 years ago
Impluse = ft.
Momentum of force = ft, so both are dimensionally identical.
Please reply me. If I am wrong.
Momentum of force = ft, so both are dimensionally identical.
Please reply me. If I am wrong.
Mimi said:
9 years ago
impulse = ft = Ns is the unit.
Moment of a force = f * distance = Nm is the unit.
Moment of a force = f * distance = Nm is the unit.
Abhishek mani bhartiya said:
9 years ago
Due to the description of torque. I can say that the exact answer is 'C'. (FULLY SATISFIED).
Paul martiins said:
9 years ago
Impulse = ft (the signal recieved by an object)
where f = newton and t = sec unit=(N/sec2).
While moment is returning effect an object makes or is de product of force * distance unit =(N/m2).
where f = newton and t = sec unit=(N/sec2).
While moment is returning effect an object makes or is de product of force * distance unit =(N/m2).
Vinay said:
8 years ago
Energy and young modulus have same dimensions.
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