Q.No.1. Select and write the correct answer. i) The speed of sound is maximum in a) Air b) Water c) vacuum d) solid ii) A force of 1N doubles the length of a cord having cross-sect... Q.No.1. Select and write the correct answer. i) The speed of sound is maximum in a) Air b) Water c) vacuum d) solid ii) A force of 1N doubles the length of a cord having cross-sectional area 1 mm². The Young's modulus of the material of cord is a) 1 N/m² b) 0.5 x 10^6 N/m² c) 10^6 N/m² d) 2 x 10^6 N/m² iii) Which bonds are present in pure semiconductor. a) Ionic b) Metallic c) Hydrogen d) Covalent iv) A vector having unit magnitude with particular direction is called a) unit vector b) null vector c) equal vector d) resultant vector
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The provided text appears to be a physics quiz consisting of multiple-choice questions. The questions cover concepts such as the speed of sound, Young's modulus, types of bonds in semiconductors, and vector properties. The goal is to select the correct answer for each question.
Answer
i) Solid ii) 10⁶ N/m² iii) Covalent iv) Unit vector
i) Solid ii) 10⁶ N/m² iii) Covalent iv) Unit vector
Answer for screen readers
i) Solid ii) 10⁶ N/m² iii) Covalent iv) Unit vector
More Information
The speed of sound is maximum in solids due to tightly packed molecules. Deformation properties are used to find Young's modulus. Pure semiconductors have covalent bonds. A vector with unit magnitude is called a unit vector.
Tips
For Young's modulus, remember it relates stress to strain. For vectors, understand the definitions of unit, null, and resultant vectors.
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