Explanation

Lead is commonly used in lead-acid batteries, which are widely used in automotive applications and for backup power systems.

Lead-acid batteries are known for their reliability and relatively low cost. 

Explanation

A capacitor is a passive two-terminal electrical component that can store energy in an electric field electrostatically.

Explanation

When meteors enter Earth’s atmosphere, they burn with light due to friction produced by rapid motion.

The high-speed entry causes the meteor to compress the air in front of it, creating intense heat and resulting in a visible streak of light.

Explanation

A SCR (Silicon Controlled Rectifier) has three pn junctions.

It consists of four layers of semiconductor material, forming a PNPN structure with three PN junctions.

Explanation

A thermistor has a negative temperature coefficient of resistance.

As temperature increases, its resistance decreases, which is opposite to most materials.

Explanation

UJT (Uni-Junction Transistor) is also known as Double Base.

It has two bases and one emitter, distinguishing it from other transistors.

Explanation

If the armature current is maintained at 200% of its rated value, the machine's rated current would be 2 times the rated current.

This is because the current is doubled from its rated value.

Explanation

To solve this problem, we need to find the total current (I) drawn from the 220 V source.

First, let's find the current through one resistor:

I1 = V/R = 220 V / 68 ohms = 3.24 A (using Ohm's Law)

Since all resistors are identical and connected in parallel, the current through each resistor is the same:

I1 = I2 = I3 = I4 = 3.24 A

Now, we can find the total current (I) by adding the currents through each resistor:

I = I1 + I2 + I3 + I4 = 3.24 A + 3.24 A + 3.24 A + 3.24 A = 12.96 A ≈ 12.94 A

So, the correct answer is: 12.94 A

Explanation

In a delta connection of an induction motor, 5 slips are typically required.

These represent the number of distinct slip rings needed for the rotor winding connections.

Explanation

The Reluctance Motor has an unsymmetrical rotor.

Its rotor has varying magnetic reluctance, which influences its operation and performance.