Measurements

Q.

One parsec is _____ light years.

Q.

Define the term unit in physics.

Q.

Answer the question in a short paragraph about 30 words. Why was Margie doing badly in geography? What did the County Inspector do to help her?

Q. A car covers a distance of 300 m in 20 seconds. Calculate the speed of the car.

1. $25m{s}^{-1}$
2. $20m{s}^{-1}$
3. $10m{s}^{-1}$
4. $15m{s}^{-1}$

Q.

It is desirable that the standards of units be easily available, invariable, indestructible and easily reproducible. If we use foot of a person as a standard unit of length, which of the above features are not present?

1. Easily available

2. Invariable

3. Indestructible

4. Easily reproducible

Q. Which of the following unit of length is used to measure the diameter of a screw?

1. Decametre
2. Metre
3. Millimetre
4. Kilometre

Q. Statement 1: Measurement is the comparison of an unknown quantity with a known quantity.
Statement 2: Unit is the known quantity.

Which of the following is correct?

1. Statement 1 is true but statement 2 is false.
2. Both the statements are false.
3. Statement 1 is false but statement 2 is true.
4. Both the statements are true.

Q. If a car travels 10 m in 2 seconds, then the speed of the car is .

1. $5m{s}^{-1}$
2. $10m{s}^{-1}$
3. $20m{s}^{-1}$

Q.

What is a measurement?

Q. Measurement is the comparison of a/an ______ quantity with some ______ quantity of the same kind.

1. known, unknown
2. known, known
3. unknown, known
4. unknown, unknown

Q.

The Utility Is Generally Related To

1. Useful

2. Useless

3. Necessary

4. Satisfaction

Q. Speed of an object is defined as the ratio of to the .

1. mass of the object
2. distance traveled
3. time taken
4. weight of the object

Q. Of the following quantities, which one has dimensions different from the remaining three

1. Angular momentum per unit mass
2. Energy per unit volume
3. Force per unit area
4. Product of voltage and charge per unit volume

Q.

The system of measurement that is accepted worldwide is ___________.

Q. If the body travels $10\text{m}$ in $2\text{s}$, what is its speed in $\text{kmph}$?

1. $36\text{kmph}$
2. $10\text{kmph}$
3. $5\text{kmph}$
4. $18\text{kmph}$

Q.

Speed could have been represented as Time/Length .

1. True

2. False

Q.

What is the unit of the vernier scale reading?

Q. The comparison of an unknown quantity with some known quantity is called __________.

1. Measurement
   
2. Unit
   
3. Motion
   
4. Conversion
   

Q. Which basic unit of measurement can describe the distance from a point A to B?

1. Seconds

2. Kilogram

3. Ampere

4. Metre

Q.

What is the difference between accurate and precise?

Q.

An ant completes moving along a circle in time 5s. How much time will it take to travel along the diameter and come back?

1. 6.36s

2. 10s

3. 3.18s

4. 5.26s

Q. Measurement means the comparison of a/an ______ quantity with some ______ quantity of the same kind.

1. 
   known, unknown
2. 
   known, known
3. 
   unknown, known
4. 
   unknown, unknown

Q.

If there are $5$ minor divisions between two major divisions, one major division representing $1^{\circ }C$, one minor division will be equal to:

1. When the mercury level is in between the divisions

2. When the mercury level coincides with a minor division

3. When the mercury level coincides with a major division

4. Depends on the type of thermometer

Q. Measurement is the comparison of an unknown quantity with a known quantity.

1. False
2. True

Q. Suppose you want to measure the time of your wristwatch. Here the time of your wristwatch is the unknown quantity. You then choose a known quantity for comparison, let say seconds. What is this known quantity called?

1. Physical Quantity
2. Fundamental Quantity
3. Unit of Measurement
4. Derived Quantity

Q. The SI unit of universal gas constant (R) is

1. Watt K^-1 mol^-1
2. Newton K^-1 mol^-1
3. Joule K^-1 mol^-1
4. Erg K^-1 mol^-1

Q.

If there are 10 minor divisions between two major divisions, one major division representing $1^{\circ }C$, one minor division will be equal to:

1. When the mercury level is in between the divisions

2. When the mercury level coincides with a minor division

3. When the mercury level coincides with a major division

4. Depends on the type of thermometer

Q. The dimension of $\frac{1}{\sqrt{{ϵ}_0{\mu }_0}}$ is that of

1. Velocity
2. Time
3. Capacitance
4. Distance

Q. A travels at the speed of $30{\text{m s}}^{-1}$ for $4\text{s}$. If the objective of A was to cover $200\text{m}$ in $8\text{s}$, what speed must it travel with in the remaining time to cover the distance?

1. $10{\text{m s}}^{-1}$
2. $30{\text{m s}}^{-1}$
3. $25{\text{m s}}^{-1}$
4. $20{\text{m s}}^{-1}$

Q.

Write down the units you would use to measure these lengths: your height