Two wires are made of the same material and have the same volume. The first wire has a cross-sectional area A and the second wire has a cross-sectional area 3A. If the length of the first wire is increased by l on applying a force F, how much force is needed to stretch the second wire by the same amount?

1. 9F

2. 6F

3. 4F

4. F

Subtopic:  Young's modulus |
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The bulk modulus of a spherical object is B. If it is subjected to uniform pressure P, the fractional decrease in radius will be:

1. PB

2. B3P

3. 3PB

4. P3B

Subtopic:  Shear and bulk modulus |
To view explanation, please take trial in the course below.
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NEET 2023 - Target Batch - Aryan Raj Singh
Please attempt this question first.
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NEET MCQ Books for 11th Physics, Chemistry & Biology