Physics Tutorial Sheet
Superconductivity
(1)What is superconductivity? What is the significance of critical temperature and critical magnetic field for superconductors?
(2)Give an account of the phenomenon of superconductivity. Explain the properties of superconductors?
(3)Discuss the formation of Cooper pairs and energy gap in superconductors on the basis of BCS theory.
(4)Describe some practical applications of superconducting materials.
(5)Write a short note on High Temperature Superconductors.
(6)A superconducting tin has a critical temperature of 3.7 K at zero magnetic field and a critical magnetic field 0.0306 tesla at 0 K. Find the critical magnetic field at 2 K.
(7)Calculate the critical current and critical current density for a sample of lead of diameter 1 mm of 4.2 K. The critical temperature for lead is 7.18 K and critical magnetic field at 0 K is 6.5 × 104 A/m.
(8)Along thin superconducting wire of a metal produces a magnetic field 105 x 103 amp/m on its surface due to the current through it at a certain temperature T. The critical field of the metal is 150 x 103 amp/m at T = 0k. The critical temperature Tc of the metal is 9.3 K. What is the value of T?
(9)A superconducting lead has a critical temperature of 6.2 K at zero magnetic field and a critical magnetic field 0.0306 tesla at 0 K. Find the critical magnetic field at 3.1 K.
(10)For a specimen of V3Ga, the critical fields are respectively 0.176 T and 0.528 T for 14 K and 12 K. Calculate the transition temperatures and critical fields at 0 K and 4.2 K.
(11)How much current can a lead wire, 1mm in diameter, carry in its superconducting state at 4.2 K? Given Bc(4.2) = 0.0548 T.
Physics Tutorial Sheet
Superconductivity
(1)What is superconductivity? What is the significance of critical temperature and critical magnetic field for superconductors?
(2)Give an account of the phenomenon of superconductivity. Explain the properties of superconductors?
(3)Discuss the formation of Cooper pairs and energy gap in superconductors on the basis of BCS theory.
(4)Describe some practical applications of superconducting materials.
(5)Write a short note on High Temperature Superconductors.
(6)A superconducting tin has a critical temperature of 3.7 K at zero magnetic field and a critical magnetic field 0.0306 tesla at 0 K. Find the critical magnetic field at 2 K.
(7)Calculate the critical current and critical current density for a sample of lead of diameter 1 mm of 4.2 K. The critical temperature for lead is 7.18 K and critical magnetic field at 0 K is 6.5 × 104 A/m.
(8)Along thin superconducting wire of a metal produces a magnetic field 105 x 103 amp/m on its surface due to the current through it at a certain temperature T. The critical field of the metal is 150 x 103 amp/m at T = 0k. The critical temperature Tc of the metal is 9.3 K. What is the value of T?
(9)A superconducting lead has a critical temperature of 6.2 K at zero magnetic field and a critical magnetic field 0.0306 tesla at 0 K. Find the critical magnetic field at 3.1 K.
(10)For a specimen of V3Ga, the critical fields are respectively 0.176 T and 0.528 T for 14 K and 12 K. Calculate the transition temperatures and critical fields at 0 K and 4.2 K.
(11)How much current can a lead wire, 1mm in diameter, carry in its superconducting state at 4.2 K? Given Bc(4.2) = 0.0548 T.
Physics Tutorial Sheet
NANO TECHNOLOGY
- What is nanotechnology?
- What do you mean by nonmaterial? How can they be fabricated? Discuss their properties.
- What are buckyballs? Describe its synthesis. Discuss their properties and application?
- What are carbon nanotubes? Explain their classification. How carbon nanotubes are synthesized? Discuss their properties and application.
- What is chemical vapours deposition technique for the production of carbon nanotubes?
- What are the various applications of nanotechnology?
Physics Tutorial Sheet
NANO TECHNOLOGY
- What is nanotechnology?
- What do you mean by nonmaterial? How can they be fabricated? Discuss their properties.
- What are buckyballs? Describe its synthesis. Discuss their properties and application?
- What are carbon nanotubes? Explain their classification. How carbon nanotubes are synthesized? Discuss their properties and application.
- What is chemical vapours deposition technique for the production of carbon nanotubes?
- What are the various applications of nanotechnology?
Physics Tutorial Sheet
NANO TECHNOLOGY
- What is nanotechnology?
- What do you mean by nonmaterial? How can they be fabricated? Discuss their properties.
- What are buckyballs? Describe its synthesis. Discuss their properties and application?
- What are carbon nanotubes? Explain their classification. How carbon nanotubes are synthesized? Discuss their properties and application.
- What is chemical vapours deposition technique for the production of carbon nanotubes?
- What are the various applications of nanotechnology?
Physics Tutorial Sheet
NANO TECHNOLOGY
- What is nanotechnology?
- What do you mean by nonmaterial? How can they be fabricated? Discuss their properties.
- What are buckyballs? Describe its synthesis. Discuss their properties and application?
- What are carbon nanotubes? Explain their classification. How carbon nanotubes are synthesized? Discuss their properties and application.
- What is chemical vapours deposition technique for the production of carbon nanotubes?
- What are the various applications of nanotechnology?
Superconductivity
(1)What is superconductivity? What is the significance of critical temperature, critical magnetic field and critical current density for superconductors?
(2)Give an account of the phenomenon of superconductivity. What are the electrical and magnetic properties of superconductors? How has it been explained?
(3)Discuss the formation of Cooper pairs and energy gap in superconductors on the basis of BCS theory.
(4)How does the entropy, specific heat and thermal conductivity varies with temp in super conductors.
(5)Explain Josephson effect in superconductors.
(6)Explain effect of Isotope on superconductors.
(7)Mention optical characteristics of superconductors.
(8)Explain London Penetration Depth.
(9)Describe some practical applications of superconducting materials.
(10)A superconducting tin has a critical temperature of 3.7 K at zero magnetic field and a critical magnetic field 0.0306 tesla at 0 K. Find the critical magnetic field at 2 K.
(11)Calculate the critical current and critical current density for a sample of lead of diameter 1 mm of 4.2 K. The critical temperature for lead is 7.18 K and critical magnetic field at 0 K is 6.5 × 104 Am-1.
(12)The penetration depth of mercury at 3.5 K is about 750 Å. What will be the penetration depth at 0 K? For mercury critical temperature Tc = 4.2 K.
Superconductivity
(1)What is superconductivity? What is the significance of critical temperature, critical magnetic field and critical current density for superconductors?
(2)Give an account of the phenomenon of superconductivity. What are the electrical and magnetic properties of superconductors? How has it been explained?
(3)Discuss the formation of Cooper pairs and energy gap in superconductors on the basis of BCS theory.
(4)How does the entropy, specific heat and thermal conductivity varies with temp in super conductors.
(5)Explain Josephson effect in superconductors.
(6)Explain effect of Isotope on superconductors.
(7)Mention optical characteristics of superconductors.
(8)Explain London Penetration Depth.
(9)Describe some practical applications of superconducting materials.
(10)A superconducting tin has a critical temperature of 3.7 K at zero magnetic field and a critical magnetic field 0.0306 tesla at 0 K. Find the critical magnetic field at 2 K.
(11)Calculate the critical current and critical current density for a sample of lead of diameter 1 mm of 4.2 K. The critical temperature for lead is 7.18 K and critical magnetic field at 0 K is 6.5 × 104 Am-1.
(12)The penetration depth of mercury at 3.5 K is about 750 Å. What will be the penetration depth at 0 K? For mercury critical temperature Tc = 4.2 K.