Q. The quantity having the same unit in all system of unit is masstimelengthtemperature Answer: time

Q. The dimensional formula for angular momentum is same as that for: torquePlank’s constantgravitational constantimpulse Answer: Plank’s constant

Q. Which of the following physical quantity is dimensionless? anglespecific gravitystrainall of these Answer: all of these

Q. Which of the following is the unit of molar gas constant? JK-1 mol-1JJK-1J mol-1 Answer: JK-1 mol-1

Q. The weight of a body is 12g. This statement is not correct because: the correct symbol for the unit of weight has not been usedthe correct symbol for gram is gm.the weight should be expressed in kg.None of the above Answer: the correct symbol for the unit of weight has not been used

Q. Give that the displacement of a particle is given by x = A² sin² kt, where t denotes the time. The unit of k is radianmetrehertzsecond Answer: hertz

Q. The volume of a cube in m3 is numerically equal to its surface area in m². The volume of the cube is 64m³1000m³216m³512m³ Answer: 216m³

Q. Which of the following is not the name of a physical quantity? KilogramDensityenergyImpulse Answer: Kilogram

Q. A laser signal is sent towards the moon with a speed of light C and returns after a time f seconds. The distance of the moon from the observer is ctct/2ct-2ct-1 Answer: ct/2

Q. Which of the following numerical values has three significant figures? 5.0550.05050.500.500 Answer: 0.500