Topic 1- Key concepts of Physics

Question 1

What is the unit for Frequency?

Answer 1

Hertz, Hz

Question 2

What is the unit for force?

Answer 2

Newton,n

Question 3

What is the unit for power?

Answer 3

Watt, W

Question 4

What are the multiples and sub-multiples of units?

Answer 4

Giga- 10^9
Mega- 10^6
Kili- 10^3
Centi- 10^-2
Mili- 10^-3
Micro- 10^-6
Nano- 10^-9

Question 5

How to convert from hours to seconds?

Answer 5

x3600

x60,x60

Question 6

How to round to significant figures?

Answer 6

-Same no. of sf as the highest no. of sf given
e.g 16 x 16.98 = 271.68

Question 7

What is the unit for electrical current?

Answer 7

Ampere, A

Question 8

What is the conventional symbol for current?

Answer 8

I

Question 9

What is the unit time?

Answer 9

seconds, s

Question 10

What is the unit for energy?

Answer 10

Joule, J

Question 11

What is the unit for Pressure?

Answer 11

Pascal, Pa

Question 12

What is the unit for electrical charge ?

Answer 12

Coulomb, C

Question 13

What is the unit for electrical potential difference ?

Answer 13

Volts, V

Question 14

What is the unit for electrical resistance ?

Answer 14

Ohms, Ω

Question 15

What is the unit for magnetic flux density ?

Answer 15

tesla, T