SI Units

Question 1

Charge (Q)

Answer 1

Coulomb (C)

Question 2

Current (I)

Answer 2

Amperes (A)
I = Q/t meaning current is a measure of charge per unit time so Amperes = Coulombs per second

Question 3

Resistance (R)

Answer 3

Ohms (Ω)

Question 4

Capacitance (C)

Answer 4

Farads (F)
C = Q/V meaning capacitance is the amount of charge stored per unit of voltage applied across a capacitor, so Farads = Coulombs per Volt

Question 5

Inductance (i)

Answer 5

Henries (H)

Question 6

Capacitive impedance (Xc)

Question 7

Inductive impedance (Xl)

Question 8

Frequency (f)

Answer 8

Hz

Question 9

Voltage / potential difference (V)

Answer 9

Volts (V)
V = I/R meaning 1V is the potential difference required to produce 1A of current in a 1Ω resistor, so the Ohm = Volts per Amp and the Amp = Volts per Ohm

Question 10

Gain (A)

Answer 10

Converted to logarithmic scale in Decibels (dB)
GdB = 20log10 (Vout / Vin)

Question 11

nano

Answer 11

n
10^ -9
Example 2nV - 2 x 10^ -9 = 0.000000002V

Question 12

micro

Answer 12

µ
10^ -6
Example 3µV - 3 x 10^ -6 = 0.000003V

Question 13

milli

Answer 13

m
10^ -3
Example 4mV - 4 x 10^ -3 = 0.004V

Question 14

kilo

Answer 14

k
10^3
Example 5kV - 5 x 10^3 = 5000V

Question 15

Mega

Answer 15

M
10^6
Example 6MV - 6 x 10^6 = 6,000,000V