Resistance and Superconductivity Quiz

How resistance change with temperature in CONDUCTOR ?

• Resistance remains constant with temperature in conductors.
• Resistance increases with temperature in conductors.
• Resistance fluctuates randomly with temperature in conductors.
• Resistance decreases with temperature in conductors.

What happens when a material becomes a superconductor?

• A material becomes a superconductor when it exhibits zero electrical resistance and expels magnetic fields.
• A material becomes a superconductor when it absorbs heat and expands.
• A material becomes a superconductor when it conducts electricity poorly.
• A material becomes a superconductor when it changes color and becomes brittle.

Discuss applications of superconductors.

• Superconductors are primarily used for heating applications.
• Applications of superconductors include magnetic levitation, MRI machines, energy storage systems, particle accelerators, and quantum computing.
• Superconductors are only found in household appliances.
• Superconductors are used in traditional light bulbs.

Describe in one or two sentences what makes superconductors different from regular conductors.

• Superconductors are made of different materials than regular conductors.
• Superconductors can only conduct electricity at high temperatures.
• Regular conductors can conduct electricity without any resistance.
• Superconductors can conduct electricity without resistance at low temperatures, unlike regular conductors which always have some resistance.

Why is this temperature important? Mention the transition temperatures of Mercury and YBCO.

• Mercury: 4.2 K, YBCO: 92 K
• Mercury: 5 K, YBCO: 80 K
• Mercury: 10 K, YBCO: 100 K
• Mercury: 0 K, YBCO: 50 K

What is an Ammeter?

• 
  An ammeter measures electric current.

• An ammeter measures voltage

• IAn ammeter measures charge

• An ammeter measures potential Difference

What is a Voltmeter?

• A voltmeter measures the potential difference (voltage).

• It is represented by the symbol A .

• A voltmeter measures charge

• A voltmeter measures electric current

How is an ammeter connected in a circuit?

• . In series with the component whose current is to be measured.

• . In parallel with the component whose current is to be measured.

• Either in series or parallel.

• Outside the circuit.

How is a voltmeter connected in a circuit?

• In series with the component whose voltage is to be measured.

• In parallel with the component whose voltage is to be measured.

• Either in series or parallel.

• At the source of the current.

What would be the impact of room-temperature superconductors on motors and generators?

• They would become 4–5 times smaller.

• They would generate more heat.

• They would require more energy to operate.

• Their efficiency would remain the same.