Qs

Question 1

If there are two light bulbs in parallel circuits and another light bulb is added also in parallel circuit what will happen to the brightest of the two bulbs?

Answer 1

they will stay the same

Question 2

How to calculate resistance

Answer 2

(R= V/I)

Question 3

How a reflex action protects you from harm

Answer 3

Reflex actions are automatic and rapid involuntary movements that protect the body from harm by quickly responding to stimuli without conscious thought. Reflex impulses travel through the spinal cord rather than going through the brain, this means their path is shorter and quicker so that they can protect us from harm

Question 4

Why replacing old light bulbs with LEDs increases energy efficiency

Answer 4

Switching to LED bulbs boosts efficiency by using less power, lasting longer, and emitting less heat. LEDs are up to 80% more efficient than incandescent bulbs, reducing electricity bills and environmental impact. They also turn on instantly and often have dimming features for better energy control.

• Lower Energy Consumption – LEDs use up to 80% less electricity than incandescent bulbs.
• Longer Lifespan – LEDs can last 25 times longer, reducing the need for replacements.
• Less Heat Waste – Incandescent bulbs convert 90% of their energy into heat, while LEDs stay cool and convert most energy into light.
• Better Light Quality – LEDs provide brighter, more consistent light with various color options.
• Environmental Impact – Lower energy use means reduced carbon emissions and waste.

Question 5

flow chart of how fossil fuels are converted into energy

Answer 5

Fossil Fuels
Combustion
Heat energy
Turbine
Mechanical energy
Generator
Electrical energy