Have an account?
Skip to Content
Build your own quiz
Suggestions for you
56 questions
Show Answers
See Preview
- 1. Multiple ChoiceWhich copper wire has the lowest resistance?1 metre of 1 mm diameter wire0.5 metre of 1 mm diameter wire0.5 metre of 0.5 mm diameter wire1 metere of 0.5 mm diameter wire
- 2. Multiple ChoiceWhat happens to a resistor when the temperature is increased?Increasesdecreasesstay the samevary randomly
- 3. Multiple Choice
The length of a certain conductor of resistance 100 is doubled and its cross-sectional area is halved. Its new resistance is
100
50
200
400
- 4. Multiple ChoiceFactor which does not affect the resistanceType of materialLength of materialMass of the materialArea of the material
- 5. Multiple Choice
Graph shows that _____________Resistance is directly proportional to AreaResistance is inversely proportional to AreaResistance is a constant while Area changes.Area is a constant while resistance changes. - 6. Multiple Choicewhich has the highest current flowing through it?R1R2R3All the same
- 7. Multiple Choice
Which one, top or bottom, offers more resistance?
top
bottom
neither
- 8. Multiple ChoiceThe unit to measure the resistivity of a wire isohmsVoltohms.mohms.s
- 9. Multiple Choice
the current in the conductor
R1=R2
R1 > R2
R2 > R1
NONE OF THE ABOVE
- 10. Multiple Choicethe resistance of the two conductorR2 > R3R2 = R3R2 < R3NONE OF THE ABOVE
- 11. Multiple Choice
The conductor with higher temperature has
high resistance
low resistance
same resistance
it does not affect the resistance
- 12. Multiple Choice
The length of a certain conductor of resistance 100 is doubled and its cross-sectional area is doubled. Its new resistance is
100
50
200
400
- 13. Multiple ChoiceMaterials that have a high electrical resistanceless lengthless tempareturemore thicknessless cross sectional area
- 14. Multiple ChoiceAmpere second could be the unit ofpowerconductancechargeenergy
- 15. Multiple Choice
The resistance of a piece of wire does not depend on _________________.
wire material
wire mass
wire length
wire cross sectional area
- 16. Multiple Choice
What happens to resistance when the length of the wire increases?
Stays the same
Increases
Decreases
- 17. Multiple Choice
What effect does a hotter temperature have on resistance?
No effect
Increases resistance
Decreases resistance
Stays the same
- 18. Multiple Choice
What other factor of a wire could affect its resistance?
Material its made of
How shiny it is
Colour
- 19. Multiple ChoiceThe type of current where charges flow in one directionDirect CurrentAlternating CurrentElectron FlowVoltage
- 20. Multiple Choice
The length of a certain wire is kept same while its radius is doubled. What is the new resistance of this wire?
It is increased by a factor of 2.
It is increased by a factor of 4.
It is reduced by a factor of 2.
It is reduced by a factor of 4.
- 21. Multiple Choice
The length of a certain wire is doubled while its radius is kept constant. What is the new resistance of this wire?
It is 2 times as large.
It is 3 times as large.
It is 4 times as large.
It is 1/2 as large.
- 22. Multiple Choice
Consider two copper wires of equal cross-sectional area. One wire has 3 times the length of the other. How do the resistivities of these two wires compare?
Both wires have the same resistivity.
The longer wire has 3 times the resistivity of the shorter wire.
The longer wire has 9 times times the resistivity of the shorter wire.
The longer wire has 27 times times the resistivity of the shorter wire.
- 23. Multiple Choice
A 20-m wire of 0.10 mm2 cross-sectional area draws 0.5 A when connected across a 3.0-V potential difference.
(a) What is the resistance of the wire?
(b) What is the resistivity of the material from which the wire is made?
(a) 1.5 Ω (b) 6.0 × 10-9 Ω • m
(a) 1.5 Ω (b) 3.0 × 10-8 Ω • m
(a) 6.0 Ω (b) 3.0 × 10-8 Ω • m
(a) 6.0 Ω (b) 6.0 × 10-9 Ω • m
- 24. Multiple Choice
For the graph shown in the figure, what physical quantity does the slope of the graph represent for ohmic material?
power
resistivity
resistance
1/(resistance)
- 25. Multiple Choicecomplete path that an electrical current travels alongresistancecircuitresistivityschematic
- 26. Multiple Choicecurrent that flows through a circuit from the positive terminal of a battery through the circuit to the negative terminal of the batterydrift accelerationdrift velocityconventional currentcurrent density
- 27. Multiple Choiceflow of charge through a cross-sectional area divided by the areadrift accelerationdrift velocityconventional currentcurrent density
- 28. Multiple Choicenonohmic circuit device that allows current flow in only one direction
diode
non-ohmic
circuit
ohmic
- 29. Multiple Choicemeasure of a material’s ability to conduct or transmit electricityelectrical powerelectrical driftelectrical conductivityelectrical current
- 30. Multiple Choicerate at which charge flows, I=dQdtelectrical powerelectrical driftelectrical conductivityelectrical current
- 31. Multiple Choice
rate of change of energy in an electric circuit per unit of time
electrical power
electrical drift
electrical conductivity
electrical current
- 32. Multiple Choice(Ω) unit of electrical resistance, 1Ω=1V/Aampere (amp)nonohmicohmohmic
- 33. Multiple Choiceempirical relation stating that the current I is proportional to the potential difference V; it is often written as V=IR , where R is the resistanceohmicnonohmicohmOhm’s law
- 34. Multiple Choiceelectric property that impedes current; for ohmic materials, it is the ratio of voltage to current, R=V/Icircuitresistanceresistivityschematic
- 35. Multiple Choiceintrinsic property of a material, independent of its shape or size, directly proportional to the resistance, denoted by ρcircuitresistanceresistivityschematic
- 36. Multiple Choicegraphical representation of a circuit using standardized symbols for components and solid lines for the wire connecting the componentsresistancecircuitresistivityschematic
- 37. Fill in the Blank
Is current density a scalar or vector quantity ?
- 38. Fill in the Blank
A cell of emf (E) and internal resistance (r) draws a current (I). Write a relation between terminal voltage (V) in terms of E,I,r. ?
- 39. Multiple Choice
What is the unit of measurement for resistance?
Voltage
Ampere
Watts
Ohms
- 40. Multiple Choice
A 3.0 Ω resistor and a 6.0 Ω resistor are connected in parallel.What is their combined resistance?
0.50Ω
2.0Ω
4.5Ω
9.0Ω
- 41. Multiple Choice
The circuit diagram shows a 4.0 Ω resistor and an 8.0 Ω resistor connected to a 6.0V battery. What is the current in the battery?
0.50A
0.75A
1.50A
2.00A
- 42. Multiple Choice
Consider a wire length L, cross-sectional area A and a resistance R. A second wire at the same temperature has a length 2L and a cross-sectional are of 1/2A. What is the resistance of the second wire
R
2R
1/2 R
4R
- 43. Multiple Choice
What is the resistance of a wire when its length is reduced by half?
Halved
Quartered
Doubled
Quadrupled
- 44. Multiple Choice
Xylene works in an electric company. She always recommends that longer extension cords should have a thicker diameter. Her recommendation made because resistance is __________.
inversely with length and directly with cross-sectional area
directly with length and inversely with cross-sectional area
directly with both length and cross-sectional area
inversely with both length and cross-sectional area
- 45. Multiple Choice
The electrical resistance pf a metallic conductor is inversely proportional to its _____________.
Temperature
Length
Cross-sectional area
Resistivity
- 46. Multiple Choice
What is the unit of used to specify the amount of resistance?
Resistance
Ampere
Volts
Ohm
- 47. Multiple Choice
What symbol represented the unit Ohm?
- 48. Multiple Choice
Which of the following is NOT included in the factors affecting resistance?
Temperature
Length
Cross-sectional area
Color
- 49. Multiple Choice
What is the correct formular in getting the resistance?
V=IxR
None
- 50. Multiple Choice
The unit of resistivity is
Ω/m
Ω/m2
Ωm
Ωm2
- 51. Multiple Choice
The nichrome wire has a cross-sectional area of 1.3 × 10–7 m2 . Resistivity of nichrome = 1.1 × 10–6 Ωm and a resistance of 53 Ω. The length of the wire is
0.63 m
63 m
0.0063 m
6.3 m
- 52. Multiple Choice
A copper wire of length 2.5 m and cross-sectional area 2.4 × 10-7 m2 has a resistivity of 1.7x10-8 Ωm. What is the resistance of the wire?
1.6x10-15 Ω
1.0x10-14 Ω
0.18 Ω
5.6 Ω
- 53. Multiple Choice
A cylindrical conductor of length l, diameter D, and resistivity ρ has a resistance R. What is the resistance of another cylindrical conductor of length l, diameter D/2 , and resistivity ρ?
8R
4R
2R
R
- 54. Multiple Choice
The equation for a material with circular cross sectional area is A=
- 55. Multiple Choice
A wire of uniform diameter 0.28 mm and a length of 1.50 m has a resistance of 45 Ω. It's resistivity is
2.2 x 10-8 Ωm
36 Ωm
1.8 x 10-6 Ωm
3.4 x 10-7 Ωm
- 56. Multiple Choice
Which change decreases the resistance of a piece
of copper wire?
increasing the wire‛s length
increasing the wire‛s resistivity
decreasing the wire‛s length
decreasing the wire‛s diameter
- Answer choicesTagsAnswer choicesTags