Exploring Electrical Engineering Materials

What is the role of semiconductors in electronics?

• Semiconductors are primarily used for mechanical support in devices.

• Semiconductors are used to store data permanently.

• Semiconductors only function at high temperatures.

• Semiconductors enable control of electrical current in electronic devices.

List two examples of magnetic materials.

• Iron, Nickel

• Copper

• Gold

• Aluminum

What is the significance of the Curie temperature in magnetic materials?

• The Curie temperature is the temperature at which all magnetic materials become superconductors.

• The Curie temperature indicates the point at which a material becomes ferromagnetic.

• The Curie temperature is the temperature at which a magnetic material gains permanent magnetism.

• The Curie temperature signifies the point at which a magnetic material loses its permanent magnetism and becomes paramagnetic.

How do dielectrics affect capacitance in capacitors?

• Dielectrics only affect the physical size of the capacitor.

• Dielectrics decrease capacitance by reducing the permittivity.

• Dielectrics have no effect on capacitance in capacitors.

• Dielectrics increase capacitance by increasing the permittivity, allowing more charge to be stored.

What is the difference between a superconductor and a regular conductor?

• Superconductors have higher resistance than regular conductors.

• Regular conductors can conduct electricity without any loss.

• Superconductors operate at room temperature, while regular conductors do not.

• Superconductors have zero electrical resistance; regular conductors have resistance.

What are the applications of ferromagnetic materials?

• Water purification systems

• Applications of ferromagnetic materials include electric motors, transformers, magnetic storage devices, magnetic sensors, and magnetic shielding.

• Construction materials for buildings

• Food preservation techniques

What is the function of a dielectric in a capacitor?

• To reduce the size of the capacitor.

• To store electrical energy without insulation.

• To decrease the voltage across the capacitor.

• The function of a dielectric in a capacitor is to increase capacitance and provide insulation.

Which valency elements used to create N type semiconductor/N टाइप अर्धचालक के लिए कितने संयोजी तत्व की आवश्यकता होती है

• Trivalent/त्रि संयोजी

• Four valent/4th संयोजी

• Pentavalent/पांच संयोजी

• Six valent/6th संयोजी

Dielectric loss proportional to /पराविद्युत हानि किसके समानुपाती होता है?

• tan(δ)

• Sec(δ)

• cos(δ)

• cot(δ)

Hysterisis curve plot between/हिस्टैरिसीस कर्व किन किन के बीच बनाया जाता है?

• Magnetic field density vs Magnetic field intensity,/चुंबकीय क्षेत्र घनत्व vs चुंबकीय क्षेत्र की तीव्रता

• Mgnetic field density vs Magnetic flux/चुंबकीय क्षेत्र घनत्व vs चुंबकीय फ्लैक्स

• Magnetic field intensity vs Magnetic flux/चुंबकीय क्षेत्र की तीव्रता vs चुंबकीय फ्लैक्स 

• None of these/इनमें से कोई नहीं