On applying stress of \(20 \times 10^8~ ​​\text{N/m}^2\), the length of a perfectly elastic wire is doubled. It's Young’s modulus will be:

1. \(40 \times 10^8~ ​​\text{N/m}^2\) 2. \(20 \times 10^8~ ​​\text{N/m}^2\)
3. \(10 \times 10^8~ ​​\text{N/m}^2\) 4. \(5 \times 10^8~ ​​\text{N/m}^2\)

Subtopic:  Young's modulus |
 74%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The ratio of lengths of two rods A and B of the same material is 1: 2 and the ratio of their radii is 2: 1. The ratio of modulus of rigidity of A and B will be:

1. 4: 1 2. 16: 1
3. 8: 1 4. 1: 1
Subtopic:  Stress - Strain |
 54%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

When a spiral spring is stretched by suspending a load on it, the strain produced is called:

1. Shearing
2. Longitudinal
3. Volume       
4. shearing and longitudinal


 

Subtopic:  Shear and bulk modulus |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A cube of aluminium of sides 0.1 m is subjected to a shearing force of 100 N. The top face of the cube is displaced through 0.02 cm with respect to the bottom face. The shearing strain would be:
1. 0.02                                   
2. 0.1
3. 0.005                                
4. 0.002

Subtopic:  Stress - Strain |
 70%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The strain-stress curves of three wires of different materials are shown in the figure. P, Q and R are the elastic limits of the wires. The figure shows that:
           

1. Elasticity of wire P is maximum
2. Elasticity of wire Q is maximum
3. Tensile strength of R is maximum
4. None of the above is true

Subtopic:  Stress - Strain Curve |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The work done in stretching an elastic wire per unit volume is:

1. stress\(\times\)strain
2. \(\frac{1}{2}\)\(\times\)stress\(\times\)strain
3.  \(2\times\)stress\(\times\)strain
4. stress/strain
Subtopic:  Potential energy of wire |
 95%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A \(5\) m long wire is fixed to the ceiling. A weight of \(10\) kg is hung at the lower end and is \(1\) m above the floor. The wire was elongated by \(1\) mm. The energy stored in the wire due to stretching is:
1. zero                                 
2. \(0.05\) J
3. \(100\) J                          
4. \(500\) J

Subtopic:  Potential energy of wire |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

If the force constant of a wire is K, the work done in increasing the length of the wire by l is:

1. Kl/2                                   

2. Kl

3. Kl2/2                                 

4. Kl2

Subtopic:  Potential energy of wire |
 70%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

When strain is produced in a body within elastic limit, its internal energy:
1. Remains constant                  
2. Decreases
3. Increases                               
4. None of the above

Subtopic:  Potential energy of wire |
 53%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The Young's modulus of a wire is Y.  If the energy per unit volume is E, then the strain will be:

1. 2EY                                         

2. 2EY

3. EY                                             

4. EY

Subtopic:  Potential energy of wire |
 81%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh