Ohm's law

1.If resistance increases and voltage remains constant, what happens to the current?

It increases
It decreases
It stays the same

2. What is the unit of resistance?

Volt
Ohm
Ampere

3.Which formula is correct according to Ohm's Law?

U = R x I
I = R x U
R = U x I

4.If voltage is 20 V and resistance is 5 Ω, what is the current?

4 A
5 A
100 A

5.What happens in an open circuit?

Current flows normally
Current increases
Current stops

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