Resistance

Question 1

What is resistance?

Answer 1

The measure of how difficult it is for current to flow through a component

Question 2

What is resistance measured in?

Answer 2

Ohms Ω

Question 3

What is charge flow affected by?

Answer 3

• The resistance

- The potential difference

Question 4

What happens to the charge flow if the resistance increases?

Answer 4

The current will decrease

Question 5

What happens to the charge flow if the potential difference increases?

Answer 5

The current will increase

Question 6

What is the equation for resistance?

Answer 6

Potential Difference (V) / Current (I)

Question 7

What are the units for:

• potential difference
• current
• resistance

Answer 7

• Potential difference = Volts (V)
• Current = amperes (A)
• Resistance = Ohms (Ω)

Question 8

What is resistance calculated by?

Answer 8

V/I

Question 9

What is potential difference measured by?

Answer 9

Voltmeter

Question 10

What is current measured by?

Answer 10

Ammeter

Question 11

The longer the wire….

Answer 11

The higher the resistance

Question 12

What does an Ohmic conductor do?

Answer 12

Obey Ohm’s Law

Question 13

What is the current in a ohmic conductor proportional to?

Answer 13

The potential difference across the resistor

Question 14

What happens to the resistance as the current changes?

Answer 14

Remains constant / Stays the same

Question 15

What do you need to measure resistance?

Answer 15

• an ammeter in series
• Ohm’s law
• a voltmeter in parallel

Question 16

What happens to he resistance in an ohmic conductor?

Answer 16

It remains constant