Physics for G10

• zero

• X.Y

If the dimensional formula of a physical quantity is MLT^-2 . then the physical quantity is

• velocity

• acceleration

• density

• force

A group of students measure the velocity of moving body, which of these measurements is more accurate ? …….m/s

• 350+20

• 340+15

• 335+10

• 320+10

If the relative error in the measurement of the mass of a box is 1.6% and the absolute error in this measurement is 0.4kg , then the mass of the box is....

• 4kg

• 25kg

• 400kg

• 0.25kg 

Candela is the measuring unit of

• amount of matter

• intensity of sound

• electric current intensity

• luminous intensity 

If the two physical quantities A and B have different dimensions , which of the following mathematical operation has a physical meaning ?

• A+B

• A-B

• AB

• 26.56⁰

• 30⁰

• 60⁰

• 63.43⁰

Which of the following is an example of the quantity as defined in physics ?

• kilograms

• 5

• mass

• 5 kilograms

Which of the following sentences describe a fundamental scalar quantity ?

• the weight of a man is 500N

• a girl moves a displacement 20 m to east

• the kinetic energy of a car is 100 J

• the mass of a piece of iron is 30 kg