Important MCQ on Conductivity for SSC

General Science has a huge weightage in every competitive exam like SSC, Banking, Railways, and other exams. One of the topics that are very important in General Science is Conductivity and Superconductors. Questions are coming frequently nowadays from this section and students need to practice more and more to revise this topic.

Important MCQ on Conductivity for SSC:

Que1. What is the feature of a Superconductor?
(a) Low permeability
(b) Zero permeability
(c) High permeability
(d) None of these

Ans. (b) Zero permeability
Explanation: The feature of a Superconductor is that it has zero permeability. Permeability is a property of a material that describes its ability to support the formation of a magnetic field.

Que2. At which temperature superconductivity could be attained?
(a) At a very low temperature
(b) At a very high temperature
(c) At room temperature
(d) None of these

Ans. (c) At room temperature
Explanation: At room temperature, superconductivity could be attained. In this way, we can save a lot of money.

Que3. Which one of the given is a superconductor?
(a) Germanium
(b) Wood 
(c) Iron
(d) Plastic

Ans. (a) Germanium
Explanation: Germanium is a superconductor. 

Que4. Which of the given is an important component of a transistor?
(a) Osmium
(b) Radium
(c) Arsenic
(d) Silicon

Ans. (d) Silicon
Explanation: Silicon is an important component of a transistor.

Que5. At absolute zero temperature, what will be the electric resistance in the semiconductor?
(a) Low
(b) Infinite
(c) Zero
(d) High

Ans. (b) Infinite
Explanation: At an absolute zero temperature,  the electric resistance in the semiconductor will be infinite.

Que6. Electric conduction is a semiconductor that takes place due to which of the following?
(a) Holes
(b) Electrons
(c) Both electrons and holes
(d) None of these

Ans. (c) Both electrons and holes
Explanation: Electric conduction is a semiconductor that takes place due to both electrons and holes. 

Que7. The resistance of a semiconductor to heating will?
(a) Constant
(b) Decreases
(c) Increases
(d) None of these

Ans. (b) Decreases
Explanation: The resistance of a semiconductor to heating will decrease.

Que8. The conductivity of a superconductor at zero degrees kelvin will become?
(a) 10 ohm
(b) 10⁵ohm
(c) 10²ohm
(d) Zero

Ans. (d) Zero
Explanation: The conductivity of a superconductor at zero degrees kelvin will become zero.

Que9. Which of the given options are high-temperature superconductors?
(a) Ceramic oxides
(b) Metal alloys
(c) Rare earth metals
(d) Inorganic polymers

Ans. (a) Ceramic oxides
Explanation: Ceramic oxides are high-temperature superconductors. Ceramic super conductors are Thelium, Barium, Calcium, and Copper oxide.

Que10. Why copper rods are preferred over iron rods? 
(a) Copper is a better conductor than iron
(b) Copper is not easily oxidized
(c) Loss of energy is less
(d) All of the above

Ans. (d) All of the above
Explanation: Copper rods are preferred over Iron rods because of better conductance, less energy loss, etc.

Que11. Nickel-Cadmium battery can be used in which of the following?
(a) Calculator
(b) Transistors
(c) Cordless electric appliances
(d) All of the above

Ans. (d) All of the above
Explanation: Nickel-Cadmium battery can be used in calculators, transistors, cordless electric appliances, etc.

Que12. Earth’s magnetic field is due to the presence of which of the following?
(a) Currents circulating inside the core
(b) Presence of magnet in the center
(c) Moving charge particles in space
(d) None of these

Ans. (a) Currents circulating inside the core
Explanation: Earth’s magnetic field is due to the presence of currents circulating inside the core.

Que13. Permeability of a substance is related to the?
(a) Degree of resistance
(b) Degree of magnetization
(c) Degree of conduction
(d) Degree of capacitance

Ans. (b) Degree of magnetization
Explanation: The permeability of a substance is related to the degree of magnetization.

Que14. The current flowing through any conductor is directly proportional to the?
(a) Voltage
(b) Resistance
(c) Potential difference
(d) None of these

Ans. (c) Potential difference
Explanation: The current flowing through any conductor is directly proportional to the potential difference.

Que15. Superconductors are very unique due to which of the following?
(a) It conducts electricity at a high temperature
(b) It offers very high resistance
(c) It conducts electricity at a low temperature
(d) It offers zero resistance in the flow of current

Ans. (d) It offers zero resistance in the flow of current
Explanation: Superconductors are very unique because they offer zero resistance in the flow of current.

Que16. What is the S.I unit of conductance?
(a) Ohm
(b) Siemens
(c) Siemens per meter
(d) Watt

Ans. (b) Siemens
Explanation: The S.I unit of conductance is Siemens. Ohm is the unit of resistance, Siemens per meter is the unit of conductivity, Watt is the unit of power.

Que17. Which of the given are the properties of superconductors?
(a) Zero resistance
(b) Meissner effect
(c) Infinite conductivity
(d) All of the above

Ans. (d) All of the above
Explanation: Zero resistance, the Meissner effect, and Infinite conductivity are the properties of superconductors.

Que18. Superconductivity can be observed in which of the given options?
(a) Infrared frequency
(b) AC and High frequency
(c) DC and Low frequency
(d) Only High frequency

Ans. (c) DC and Low frequency
Explanation: Superconductivity can be observed in both DC and Low frequency.

Que19. Substances that offer zero resistivity are known as?
(a) Semiconductors
(b) Superconductors
(c) Conductors
(d) Capacitors

Ans. (b) Superconductors
Explanation: Superconductors offer zero resistivity.

Que20. Which of the given options is an example of a Type II superconductor?
(a) Vanadium
(b) Aluminum
(c) Lead
(d) Mercury

Ans. (a) Vanadium
Explanation: Vanadium is an example of a Type II superconductor. Rest are examples of Type I superconductors.