Quiz on units

Interactive MCQs on Conventions of Writing Units

Score: 0/10

Question 1 of 10

Which is the correct way to write the SI unit for force?

A. Newton

B. newton

C. N

D. n

Correct! The SI unit for force is newton, but its symbol is written as 'N' (uppercase).

Not quite right. Remember that while the unit is called "newton", its symbol is always written as uppercase 'N'.

Question 2 of 10

Identify the error in this unit: "Km".

A. 'K' should be small

B. 'm' should be capital

C. Both letters are correct

D. SI units don't include "Km"

Exactly right! The correct symbol is "km" with lowercase 'k' for kilo.

Actually, the error is that 'K' should be lowercase. The prefix for kilo- is always lowercase 'k'.

Question 3 of 10

Which shows correct spacing between number and unit?

A. 5m

B. 5 m

C. 5 m

D. 5-m

Perfect! There should be a single space between the number and the unit.

The correct answer is B. There should be exactly one space between the number and the unit.

Question 4 of 10

Why should we follow proper unit writing rules?

A. To impress others

B. To save time

C. For clarity and universal understanding

D. Because teachers say so

Absolutely! Standardized units ensure clear communication in science worldwide.

Actually, the main reason is C. Standardized units allow scientists everywhere to understand measurements clearly.

Question 5 of 10

Which of these is a derived SI unit?

A. m

B. s

C. kg

D. N

Correct! Newton (N) is a derived unit from the base units kg·m/s².

The derived unit here is D (newton). The others are base SI units.

Question 6 of 10

Following rules while writing units shows:

A. Obedience

B. Kindness

C. Generosity

D. Carelessness

That's right! Following conventions shows obedience to established standards.

Actually, the best answer is A. Following unit conventions demonstrates obedience to scientific standards.

Question 7 of 10

SI unit of time is:

A. min

B. sec

C. s

D. t

Exactly! The SI unit for time is second, abbreviated as 's'.

The correct SI unit is C (s). While "sec" is sometimes used, it's not the official SI symbol.

Question 8 of 10

When you correct a friend's mistake in writing a unit, you show:

A. Jealousy

B. Helpfulness

C. Anger

D. Laziness

Correct! Politely correcting someone shows helpfulness and care for accuracy.

The best answer is B. When done politely, correcting unit errors shows helpfulness.

Question 9 of 10

Which is the correct representation of "kilogram"?

A. KG

B. Kg

C. kg

D. kG

Perfect! The kilogram is unique as it's the only SI unit with a prefix, written as 'kg'.

Actually, the correct form is C (kg). The kilogram is unique among SI units in having a prefix.

Question 10 of 10

Writing "CM" instead of "cm" shows:

A. You are creative

B. You are not aware of the rule

C. You follow rules strictly

D. You are good in grammar

Right! The correct symbol is lowercase 'cm'. Uppercase would suggest a different meaning.

The most accurate answer is B. The correct symbol is lowercase 'cm' for centimeters.