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If the length of a heater coil is reduced by 10% of its original length, then Power consumed by heater will?

If the length of a heater coil is reduced by 10%, the power consumed will increase by more than 10%. To understand why, let’s look at the basic formula in simple terms.

The power used by an electric heater is given... Read More

1 EVERYDAY SCIENCE MCQS

If the length of a heater coil is reduced by 10% of its original length, then Power consumed by heater will?

  • Increase by 0.5%
  • Decrease by 10%
  • Increase over 10%
  • Decrease by 0.5%
Correct Answer: C. Increase over 10%

Detailed Explanation

If the length of a heater coil is reduced by 10%, the power consumed will increase by more than 10%. To understand why, let’s look at the basic formula in simple terms.

The power used by an electric heater is given by the formula:
P = V² / R
Where:
- P is power,
- V is voltage,
- R is resistance.

Now, resistance (R) of a coil is directly proportional to its length. This means:
- If you decrease the length of the coil, its resistance becomes lower.
- Lower resistance allows more current to flow, which increases the power consumption.

So, when you reduce the length of the coil by 10%, the resistance becomes less. This reduced resistance causes a sharp increase in power. However, the increase in power is not just 10%, it’s **more than 10%**, because power is inversely related to resistance and changes non-linearly.

Let’s understand with an example:
- Suppose the original resistance is 100 ohms.
- Reducing the coil by 10% brings resistance to around 90 ohms.
- Using the formula, the new power is V² / 90 compared to the old V² / 100.
- That’s an increase of more than 10% in power!

✅ Therefore, the correct answer is: Increase over 10%.

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Which planet is much brighter in our solar system?
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Everyday Science MCQs
The main function of kidney is?
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Everyday Science MCQs
The energy stored in a dam is?
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Everyday Science MCQs
Moon light reaches to earth in __________ seconds?
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Everyday Science MCQs
Who developed the telegraph code?
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Everyday Science MCQs
How many numbers of chromosomes in Pea plant?
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Everyday Science MCQs
Which of these plants opens its mouth when an insect sits on its lid?
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Everyday Science MCQs
Which of the following are positively (+) charged particles?
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Everyday Science MCQs
Which of the following subatomic particles carries a negative electric charge?
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Everyday Science MCQs
Which of the following has no electric charge?
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Everyday Science MCQs
Elements are made of _________?
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Everyday Science MCQs
SI unit of time is_________?
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Everyday Science MCQs
The speed of light is __________?
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Everyday Science MCQs
The soul of chemistry is dealing with __________?
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Everyday Science MCQs
Which one is the most common disease?
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Everyday Science MCQs
Orange belongs to the family
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Everyday Science MCQs
Vertebral Column in human beings consists of how many vertebrae?
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Everyday Science MCQs
What is anything that takes up space and has mass?
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Everyday Science MCQs
All matter is made of ___________?
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Everyday Science MCQs
What are considered the building blocks of matter?
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Everyday Science MCQs
What are the three subatomic particles of an atom?
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Everyday Science MCQs
The protons and neutrons are found in the center of the atom, which is called the _________of the atom?
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