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

Porcelain is an insulating material with high resistance to electrical current.

This making it suitable for use in insulators for electrical wiring and components.

In contrast, Aluminum, Copper, and Silver are conductors that allow electrical current to flow easily.

Explanation

• The choroid is the layer of blood vessels between the sclera and retina, and it absorbs excess light.
• It preventing it from reflecting back through the retina and causing glare or haze, much like the black point in a camera.

Explanation

The correct order goes from smallest to largest: 1 millimetre (mm) = 0.1 centimetre (cm), and 1 centimetre (cm) = 0.01 meter (m).

Explanation

• If a human-made (artificial) body moves around a celestial body it is called an artificial satellite.
• Artificial satellites are objects placed into orbit around celestial bodies by humans for purposes such as communication, weather monitoring, and scientific research.

Explanation

• The fuel (gasoline or diesel) in a car is a form of chemical energy, which is stored in the bonds of the fuel molecules.
• When the fuel is burned in the engine, this chemical energy is converted into kinetic energy (the energy of motion) through a series of processes, including combustion, transmission, and propulsion.

Explanation

• Jupiter is largest planet.
• It's a very stormy planet.
• It has great red spot.
• It has largest moon; ganymede.
• It was discovered by Galileo in 16th century.

Explanation

• Reflection is the process by which light rays bounce back from a surface, without being absorbed or transmitted.
• This occurs when light hits a material object, such as a mirror, metal, or water.

Explanation

• Swimmers make their bodies streamlined to reduce friction underwater.
• It allowing them to move more efficiently and quickly through the water.

Explanation

• A wheel with a rod, called an axle, through its center lifts or moves loads.
• Example: Screw driver, handle is wheel and its shaft is axle, a car wheel.

The wheel and axle simple machine is used in many applications, such as:

• Transportation (cars, bicycles, etc.)
• Lifting heavy loads (cranes, winches, etc.)
• Moving objects (wheelbarrows, shopping carts, etc.)