Physics Quiz

If a bulb requires 2A of current and is connected to a 12V battery, what are the resistance and power of the bulb?

• 12Ω and 24 W

• 12Ω and 12 W

• 6Ω and 12W

• 6Ω and 24W

What is the primary function of photoresist in the CMOS fabrication process?

• To provide a conductive path for interconnects

• To act as a semiconductor material for current conduction

• To protect certain areas of the wafer during etching

• To provide insulation between transistors

Describe the changes to the magnitude and direction of the force on one of the charges in an electric dipole when the distance between the charges increases.

• The magnitude of the force increases and the direction of the force stays the same.

• The magnitude of the force decreases and the direction of the force changes to be opposite.

• The magnitude of the force decreases and the direction of the force stays the same.

• The magnitude of the force increases and the direction of the force changes to be opposite.

During the fabrication of a MOSFET, the source and drain regions are typically created by:

• Photolithography

• Chemical vapor deposition (CVD)

• Ion implantation

• Thermal oxidation

In an n-type extrinsic semiconductor, the majority charge carriers are:

• Positive ions

• Electrons

• Holes

• Both holes and electrons in equal numbers

In a Zener diode, what happens to the P-N junction when it is reverse biased beyond the Zener breakdown voltage?

• The P-N junction enters Zener breakdown, allowing reverse current to flow, maintaining a constant voltage.

• The P-N junction stops conducting entirely.

• The P-N junction allows current to flow freely without resistance.

• The P-N junction generates light due to recombination of carriers.

Which of the following is NOT correct about insulator?

• Insulators have good conductivity

• Valence electrons are tightly bound to the atoms.

• Most insulators are compounds and have very high resistivity.

• An insulator does not conduct electrical current under normal conditions.

In an n-type extrinsic semiconductor, the minority charge carriers are:

• Electrons

• Both holes and electrons in equal numbers

• Positive ions

• Holes

A wire carrying a current of 5A produces a magnetic field at a distance of 1m. If the current is increased to 10A, what happens to the magnetic field at the same distance?

• It is halved.

• It is doubled.

• It remains the same.

• It becomes four times greater.

If the distance from a long straight current-carrying conductor is doubled, the magnetic field strength at that point will:

• Becomes four times greater.

• Remains same

• Halve

• Double