Units and Measurements

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Question

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Question 1 : Physical quantities are
1. quantities such as degrees, radians and steradians
2. quantities such as pounds, dollars and rupees
3. quantities such as kilos, pounds and gallons
4. quantities such as length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity
Answer
8174

Question 2 : Which of the following pairs has the same dimensions?
1. specific heat and latent heat
2. lmpulse and momentum
3. surface tension and force
4. moment of lnertia and torque
Answer
8175

Question 3 : The dimensions of kinetic energy is
1. [M 2L2T]
2. [ML 2T]
3. [ML 2T-2]
4. [ML 2T-1]
Answer
8176

Question 4 : A force F is given by F = at + bt², where t is time. What are the dimensions of a and b?
1. MLT-3 and MLT-4
2. MLT-4 and MLT1
3. MLT-1 and MLT0
4. MLT-3 and ML2T4
Answer
8177

Question 5 : The atmospheric pressure is 106 dyne/cm². What is its value in SI unit?
1. 105 newton/m²
2. 106 newton/m²
3. 104 newton/m²
4. 103 newton/m²
Answer
8178