What does Ohm’s Law state?
A
Voltage = Current × Power B
Voltage = Resistance ÷ Current C
Voltage = Current × Resistance D
Current = Voltage × Resistance
Analysis & Theory
Ohm's Law is V = I × R (Voltage = Current × Resistance).
If V = 10V and R = 2Ω, what is the current (I)?
A
5A B
0.2A C
20A D
2A
Analysis & Theory
I = V / R = 10 / 2 = 5A.
Which unit is used to measure resistance?
A
Volt B
Ohm C
Ampere D
Watt
Analysis & Theory
Resistance is measured in ohms (Ω).
If the current is 3A and resistance is 4Ω, what is the voltage?
A
12V B
1.33V C
7V D
0.75V
Analysis & Theory
V = I × R = 3 × 4 = 12V.
What happens to current if resistance increases while voltage stays the same?
A
Current increases B
Current decreases C
Voltage increases D
Nothing changes
Analysis & Theory
Higher resistance reduces current if voltage is constant.
In Ohm’s law, current is directly proportional to:
A
Voltage B
Resistance C
Power D
Charge
Analysis & Theory
Current increases with voltage when resistance is constant.
Which of the following represents resistance?
A
A B
V C
Ω D
W
Analysis & Theory
Resistance is denoted by the symbol ohm (Ω).
If current is 2A and voltage is 6V, what is the resistance?
A
12Ω B
3Ω C
4Ω D
1Ω
Analysis & Theory
R = V / I = 6 / 2 = 3Ω.
Ohm's law is not applicable to which type of materials?
A
Metals B
Semiconductors C
Superconductors D
Non-ohmic materials
Analysis & Theory
Non-ohmic materials don't follow Ohm’s law (e.g., diodes, transistors).
The SI unit of voltage is:
A
Ampere B
Ohm C
Watt D
Volt
Analysis & Theory
Voltage is measured in volts (V).