Electricity

Question 1

How does an electron gun work?

Answer 1

• Electrons emitted from hot wire.
• Large p.d between anode and filament.
• Electrons accelerate to anode.
• Electrons pass through gap in anode.

Question 2

What is Ohm’s law?

Answer 2

For a metallic conductor kept at constant temperature, current across wire is directly prop to p.d across its ends.