Mechanical Properties of Fluids Class 12 MCQ. We covered all the Mechanical Properties of Fluids Class 12 MCQ in this post for free so that you can practice well for the exam.
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MCQ on Mechanical Properties of Fluids for Class 12 Students
When a uniform wire of radius r is stretched by a 2kg weight, the increase in its length is 2.00 mm. If the radius of the wire is r/2 and other conditions remain the same, the increase in its length is
1. 8mm
2. 4mm
3. 2mm
4. 1mm
Option 1 – 8mm
An iron wire of length 4m and diameter 2mm is loaded with a weight of 8 Kg. If Young’s modulus Y for Iron is 2×10¹¹ N/m². Then the increase in the length of the wire is
1. 1mm
2. 2mm
3. 0.5mm
4. 8mm
Option 3 – 0.5mm
Which law governs the working of spring balance
1. Robert Hooke’s law
2. Newton’s Law
3. Keplor’s Law
4. Young’s Law
Option 1 – Robert Hooke’s law
The theoretical value of the Poisson ratio lies between
1. -1 and 0
2. -1 and 0.5
3. 0.5 and 1
4. None
Option 2 – -1 and 0.5
When a spring is loaded, the strain produced is
1. shearing
2. volumetric
3. longitudinal
4. none of these
Option 1 – shearing
A wire whose cross-sectional area is 2mm² is stretched by a certain load. If a similar wire of triple the area of cross-section is stretched by the same load, the elongation of the second wire would be.
1. 0.033mm
2. 0.03mm
3. 0.3mm
4. 0.66mm
Option 1 – 0.033mm
A long spring is stretched by 2 cm and its potential energy is V. If the spring is stretched by 10cm. Its potential energy will be
1. 25V
2. V/5
3. 5V
4. V/25
Option 1 – 25V
The upper end of the wire is 1m long and 4mm radius clamped. The lower end is twisted by an angle of 30°. The angle of the shear is
1. 0.12°
2. 0.0012°
3. 1.2°
4. 120°
Option 1 – 0.12°
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