Question

Визначити ступінь небезпеки ураження електричним струмом людини при дотику її до струмопровідної поверхні з напругою 220В , якщо опір тіла людини дорівнює 100 кОм.

Answer 1

Ответ:

2,2 мА

Объяснение:

U=220 B     R=10⁵ Ом    I=?

===

I=U/R=220/10⁵=2.2*10⁻³ A

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Answer 2

Ответ:

Объяснение:

Определить степень опасности поражения электрическим током человека при прикосновении его к токопроводящей поверхности с напряжением 220 В, если сопротивление тела человека равно 100 кОм.

Дано:

U = 220 В

R = 100 кОм = 100 000 Ом

__________

I - ?

По закону Ома:

I = U / R

I = 220 / 100 000 = 2,2·10⁻³ А  или  I = 2,2 мА

Это - слабое поражение электрическим током.

Answer 3

Determining the Degree of Danger of Electric Shock

When a person comes into contact with a conductive surface that has a voltage of 220V, the danger of electric shock depends on several factors, including the resistance of the human body. In this case, the resistance of the body is given as 100 kΩ.

To determine the degree of danger, we can use Ohm's Law, which states that the current (I) flowing through a conductor is equal to the voltage (V) divided by the resistance (R). Mathematically, it can be expressed as:

I = V / R

Substituting the given values into the equation, we have:

I = 220V / 100,000Ω

Calculating this, we find that the current flowing through the body is 0.0022 Amperes (or 2.2 milliamperes).

Now, let's assess the degree of danger based on the current level:

- Currents below 1 milliampere (mA) are generally considered safe and are unlikely to cause harm to the human body. - Currents between 1 and 5 mA can cause a tingling sensation or mild shock but are still generally considered safe. - Currents between 5 and 15 mA can cause a painful shock and muscle contractions, but the risk of serious injury is still relatively low. - Currents above 15 mA can lead to severe muscle contractions, difficulty breathing, and an increased risk of injury or death.

In this case, the current flowing through the body is 2.2 mA, which falls within the range of currents that can cause a ting