Physics Group - I (3110011) MCQs

MCQs of Superconductivity

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1.
Helium gas - was liquefied at __________ by Dutch Physicist Heike Kamerlingh Onnes in 1908.
(a) 3.5 K
(b) 4.8 K
(c) 2.4 K
(d) 4.2 K
Answer:

Option (d)

2.
The superconducting state is influenced by the
(a) temperature
(b) current
(c) magnetic field
(d) all of these
Answer:

Option (d)

3.
At critical temperature,
(a) material's electrical resistivity drops to absolute zero
(b) material's conductivity drops to absolute zero
(c) material's thermal properties drop to absolute zero
(d) all of these
Answer:

Option (a)

4.
Superconductivity is observed in
(a) some metals
(b) alloys
(c) ceramics
(d) all of these
Answer:

Option (d)

5.
Electrical resistance of a superconductor is very low, It is of the order of
(a) 10-5 Ω
(b) 107 Ω
(c) 10-7 Ω
(d) 10-10 Ω
Answer:

Option (c)

6.
Equation to calculate the change in critical temperature with isotopic mass is
(a) Tc α 1M 
(b) Tc α 1 m 
(c) Tc α 1 8 m 
(d) T α 1 m 
Answer:

Option (a)

7.
The minimum magnetic field required to destroy the superconducting state is called
(a) critical temperature
(b) critical resistance
(c) critical magnetic field
(d) critical current
Answer:

Option (c)

8.
The complete expulsion of all the magnetic field lines by a superconductor material is called
(a) Magnetic field effect
(b) Isotope effect
(c) Persistence current
(d) Meissner effect
Answer:

Option (d)

9.
For superconductors, magnetic susceptibility is
(a) + 1
(b) 0
(c) + 0.5
(d) - 1
Answer:

Option (d)

10.
Magnetic susceptibility is the ratio of
(a) magnetization to magnetic field
(b) magnetic field to magnetization
(c) polarization to magnetic field
(d) polarization to electric field
Answer:

Option (a)

Showing 1 to 10 out of 39 Questions
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