SI Derived Units

Question 1

radian (rad)

(m/m)

Answer 1

plane angle

Question 2

steradian (sr)

(m²/m²)

Answer 2

solid angle

Question 3

hertz (Hz)

(s^-1)

Answer 3

frequency

Question 4

newton (N)

(kg · m · s^-2)

Answer 4

force, weight

Question 5

pascal (Pa)

(kg · m^-1 · s^-2)

Answer 5

pressure, stress

= N/m²

Question 6

joule (J)

(kg · m² · s^-2)

Answer 6

energy, work, heat

= N · m

= Pa · m³

Question 7

watt (W)

(kg · m² · s^-3)

Answer 7

power, radiant flux

= J/s

Question 8

coulomb (C)

(s · A)

Answer 8

electric charge

Question 9

volt (V)

(kg · m² · s^-3 · A^-1)

Answer 9

electric potential difference (voltage), emf

= W/A

= J/C

Question 10

farad (F)

(kg^-1 · m^-2 · s⁴ · A²)

Answer 10

capacitance

= C/V

Question 11

ohm (Ω)

(kg · m² · s^-3 · A^-2)

Answer 11

electric resistance, impedance, reactance

= V/A

Question 12

siemens (S)

Answer 12

electrical conductance

= Ω^-1

Question 13

weber (Wb)

Answer 13

magnetic flux

= V · s

Question 14

tesla (T)

Answer 14

magnetic field strength

= Wb/m²

Question 15

henry (H)

Answer 15

inductance

= Wb/A

Question 16

degree Celsius (°C)

(K)

Answer 16

temperature relative to 273.15 K

Question 17

lumen (lm)

Answer 17

luminous flux

Question 18

lux (lx)

Answer 18

illuminance

= lm/m²

Question 19

becquerel (Bq)

Answer 19

radioactivity (decays per unit time)

Question 20

gray (Gy)

Answer 20

absorbed dose (of ionising radiation)

= J/kg

Question 21

sievert (Sv)

Answer 21

equivalent dose (of ionising radiation)

= J/kg

Question 22

katal (kat)

(mol · s^-1)

Answer 22

catalytic activity