- Which material among the ones in the graph * is nonohmic material?
Diode
Light bulb
Resistor
Diode and Light bulb

Answer

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Answer

\( \boxed{\text{Final Answer: Diode and Light bulb}} \)

Steps

Step 1 ：Analyze the voltage-current relationship for each material

Step 2 ：Diode: non-linear (nonohmic)

Step 3 ：Light bulb: non-linear (nonohmic)

Step 4 ：Resistor: linear (ohmic)

Step 5 ：\( \boxed{\text{Final Answer: Diode and Light bulb}} \)