Resistivity
Quiz by tyas ajeng
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23 questions
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- Q1What does the resistivity of a material depend on?The cross-sectional area of the materialThe nature of the materialThe length of the materialThe temperature of the room30s
- Q2What is the SI unit of resistivity?Ohm meterAmpereOhmCoulomb30s
- Q3What is the effect of increasing the cross-sectional area of a wire on its resistivity?Increases resistivityDecreases resistivityNo effectInitially decreases then increases30s
- Q4If the resistivity of a material remains constant, what happens to the resistance if the length of the wire is doubled and the cross-sectional area is halved?DoublesQuadruplesHalvesRemains the same30s
- Q5What defines the resistivity of a material?The speed of electric current through itIts capacity to store electric chargeIts ability to conduct electric currentIts ability to oppose the flow of electric current30s
- Q6In the context of electrical resistivity, what does a low resistivity indicate about a material?High opacityPoor electrical conductivityGood electrical conductivityHigh thermal conductivity30s
- Q7Which of the following statements is true about an ohmic conductor?The resistance increases as the current increasesThe resistance remains constant regardless of the applied voltage or currentThe resistance fluctuates randomly with changes in voltage or currentThe resistance decreases as the voltage increases30s
- Q8What characteristic of an ohmic conductor follows Ohm's Law?The current passing through is inversely proportional to the temperatureThe current passing through is directly proportional to the voltage appliedThe resistance decreases as temperature increasesThe conductivity decreases with increasing voltage30s
- Q9What is the characteristic of an ohmic conductor in terms of its resistance?The resistance decreases as the current increasesThe resistance is constant regardless of the voltage or currentThe resistance is inversely proportional to voltageThe resistance increases as the temperature decreases30s
- Q10What happens to the voltage across an ohmic conductor when the current through it is doubled?The voltage also doublesThe voltage remains the sameThe voltage quadruplesThe voltage halves30s
- Q11What is the relationship between the resistance of an ohmic conductor and the cross-sectional area of the conductor?The resistance increases as the cross-sectional area increasesThe resistance is not affected by the cross-sectional areaThe resistance decreases as the cross-sectional area increasesThe resistance remains the same regardless of the cross-sectional area30s
- Q12What is a common cause of non-ohmic behavior in a conductor?Temperature changesConductor materialConductor diameterConductor length30s
- Q13What property of a non-ohmic conductor makes it different from an ohmic conductor?Temperature is not constantResistance is not constantCurrent is not constantVoltage is not constant30s
- Q14Which of the following is an example of a non-ohmic conductor?A light bulb filamentA gold-plated wireA straight copper wireA silver alloy wire30s
- Q15What is the most common non-ohmic behavior exhibited by a diode?OverloadingRectificationVoltage dropShort-circuiting30s