A to Z of Physics: Multiple choice questions, Units

Thursday, January 1, 2009

22.Unit used to measure nuclear diameter is

Ans : 1. picometer 2. Fermi 3. Micron 4. millimeter

23. S.I unit of Electric Intensity is

Ans : 1. coulomb / m 2. Henry 3. V / m 4. watt

24. Which is the dimensional formula of the physical quantity whose dimensional S.I unit is Siemen .

Ans : 1. $M^{-1}L^{-2}T^3I^3$ 2. $M^{-1}L^{-1}T^3I^3$ 3. $M^1L^{-2}T^3I^3$ 4. $M^{-1}L^{-2}T^2I^2$

25. Which is the physical quantity whose dimensional formula is $M^1L^0T^{-2}$ is

Ans : 1. Bulk Modulus 2. Electric conductance 3. Surface tension 4. Frequency

26 . If $M^aL^bT^cI^d$ is the dimensional formula of resistance, then the value of 4a+5b+c-2d

Ans : 1. 15 2. 10 3. 8 4. 12

27. If $M^aL^bT^c$ is the dimensional formula of force, find the value of 2a-b-c

Ans : 1. 8 2. -4 3. 3 4. 6

28. If $M^aL^bT^c$ is the dimensional formula of momentum, and $M^xL^yT^z$ dimensional formula of energy find the value of ax+by-cz .

Ans : 1. -3 2. -1 3. 2 4. 7

29.Which of the following is a derived unit ?

Ans : 1. ampere 2. mole 3. candela 4. newton

30. Which of the following is not a physical quantity ?

Ans : 1. kelvin 2. candela 3. henry 4. all the above

A to Z of Physics