Basic Electrical (MCQ)
Question 1: Which of the following is the symbol of ohms?
A ohm(Ω)
B α
C β
D Ú©
Answer: A ohm(Ω)
Question 2: In Ohms law current flows through _____ devices ?
A Conductor
B Insulator
C Resistor
D All the above
Answer: D All the above
Question 3: Which of the following statements are true with regard to resistance?
A Resistance is inversely proportional to the resistivity of the wire
B Resistance is directly proportional to a length of the wire
C Resistance is inversely proportional to the length of the wire
D Resistance is directly proportional to an area of cross section of the wire
Answer:B Resistance is directly proportional to a length of the wire
Question 4: Which of the following statements are true with regard to resistivity?
A Resistance depends on the temperature
B Resistivity depend on area of cross section
C Resistivity depend on the length
D Resistance does not depend on the temperature
Answer: A Resistance depends on the temperature
Question 5: Which among the following is a unit for resistivity?
A ohm-metre
B ohm/metre
C ohm/cm
D ohm/km
Answer: A ohm-metre
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Question 6: The reciprocal of resistivity is________ ?
A Conductance
B Conductivity
C Impedance
D Resistance
Answer: B Conductivity
Question 7: Identify the material which is suitable for making standard resistors.
A Constantan
B Germanium
C Copper
D Silver
Answer: A Constantan
Question 8: Which of the following relation is significant for metals when the temperature increases?
A Resistivity increases and conductivity decreases
B Temperature dependence is non-linear
C Resistivity and conductivity do not change with temperature
D Resistivity decreases and conductivity decreases
Answer: A Resistivity increases and conductivity decreases
Question 9: Which among the following has weak temperature dependence values with resistivity?
A Germanium
B Copper
C Nichrome
D Silver
Answer: C Nichrome
Question 10: Which of the following is not a valid reason for using alloys to make standard resistors?
A Alloys have a large temperature coefficient
B Alloys have a high value of resistivity
C They are least affected by air and moisture
D Their contact potential with copper is small
Answer: A Alloys have a large temperature coefficient
Summary Report
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Correct Answers: 0
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