Conductivity

Question 1

What is Conductivity?

Answer 1

The ability of a solution to carry an electric current.
Is based on Ohms Law. Conductance is the inverse of resistance.

Question 2

What makes a solution conductive?

Answer 2

Electrolytes- have high conductivity, salts & minerals different strengths.

Question 3

How do we measure and talk about conductivity? (Units)

Answer 3

Units for conductivity are Siemens. Ohms are the units of resistance and are the reciprocal of Siemens.

Question 4

What are the units for conductivity?

What are the reciprocal?

Answer 4

Siemens

Ohms are the units of resistance and are the reciprocal of Siemens.

Question 5

What are the units of resistance?

What are the reciprocal?

Answer 5

Ohms are the units of resistance and are the reciprocal of Siemens (conductivity)

Question 6

Why measure conductivity?

Answer 6

• Fundamental measurement of water, purity
• Mineral Concentration
• Chemical concentration

Question 7

What is Ohm’s Law?

Answer 7

Ohm’s Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.

To students of electronics, Ohm’s Law (E = IR) is as fundamentally important as Einstein’s Relativity equation (E = mc²) is to physicists.

E = I x R

When spelled out, it means voltage = current x resistance, or volts = amps x ohms, or V = A x Ω.

Question 8

What are the:

1. Ohm’s Law symbol
2. Unit of measure (abbreviation)
3. Role in circuits

For Voltage

Answer 8

1. E
2. Volt (V)
3. Pressure that triggers electron flow

E = electromotive force (old-school term)

Question 9

What are the:

1. Ohm’s Law symbol
2. Unit of measure (abbreviation)
3. Role in circuits

For Current

Answer 9

1. I
2. Ampere, amp (A)
3. Rate of electron flow

I = intensity

Question 10

What are the:

1. Ohm’s Law symbol
2. Unit of measure (abbreviation)
3. Role in circuits

For Resistance

Answer 10

1. R
2. Ohm (Ω)
3. Flow inhibitor

Ω = Greek letter omega