PHYSICAL QUANTITIES Quiz

What is the main difference between scalar and vector quantities?

• Scalar quantities have both magnitude and direction

• Scalar quantities have only magnitude, while vector quantities have both magnitude and direction.

• Vector quantities have only magnitude

• There is no difference between scalar and vector quantities

Give an example of a scalar quantity and a vector quantity.

• Distance (scalar) and Force (vector)

• Temperature (scalar) and Acceleration (vector)

• Mass (scalar) and Velocity (vector)

• Volume (scalar) and Momentum (vector)

Explain the concept of displacement as a vector quantity.

• Displacement is a scalar quantity that measures the distance traveled by an object.

• Displacement is a vector quantity that measures the change in position of an object in a specific direction.

• Displacement is a vector quantity that measures the force exerted by an object in a specific direction.

• Displacement is a vector quantity that measures the speed of an object in a specific direction.

What is the SI unit for measuring length?

• second (s)

• liter (L)

• gram (g)

• meter (m)

What is the difference between accuracy and precision in measurements?

• Accuracy is how close a measurement is to the true value, while precision is how close the measurements are to each other.

• Accuracy is the same as precision.

• Accuracy and precision are the same thing.

• Accuracy is how precise a measurement is, while precision is how accurate the measurements are.

How is the volume of an irregular object measured in the laboratory?

• Counting method

• Weighing method

• Length method

• Displacement method

Explain the concept of dimensional analysis and its importance in physics.

• Dimensional analysis is only used in chemistry, not in physics

• Dimensional analysis is not important in physics

• Dimensional analysis is only used for theoretical calculations, not in practical experiments

• Dimensional analysis is important in physics as it helps in deriving relationships between physical quantities, checking the correctness of equations, and converting units.

What are the dimensions of velocity and how are they derived?

• Volume/Time

• Mass/Time

• Speed/Distance

• Length/Time

Solve the linear equation: 2x + 5 = 15

• x = 10

• x = 7

• x = 5

• x = 3

Find the value of y in the linear equation: 3y - 7 = 11

• y = 14

• y = 3

• y = 6

• y = 10