Question 1 of 10
Which electrical quantity is primarily responsible for causing electric shock?
Electric shock is caused by the flow of current through the body. Voltage provides the 'pressure' to drive this current, but it's the current that causes harm.
Question 2 of 10
What is the approximate resistance of the human body in dry conditions?
In dry conditions, the human body's resistance is relatively high, around 100,000 Ohms, which limits current flow.
Question 3 of 10
What happens to the human body's resistance when it is wet?
Wet conditions lower the skin's resistance, allowing more current to flow through the body for a given voltage.
Question 4 of 10
According to Ohm's Law, what is the relationship between current (I), voltage (V), and resistance (R)?
Ohm's Law states that current is directly proportional to voltage and inversely proportional to resistance.
Question 5 of 10
Why is a 12V battery generally considered safe to touch the terminals with bare hands?
The 12V is not high enough to push significant current through the body's resistance, especially in dry conditions.
Question 6 of 10
What is the approximate current level at which a person will start feeling a painful sensation?
Currents between 3-9 mA often cause painful sensations.
Question 7 of 10
What is a potential hazard of shorting a battery's terminals?
Shorting the terminals allows for a rapid discharge of energy, which can generate heat and potentially lead to an explosion.
Question 8 of 10
What can happen if you connect a battery's terminals in reverse (positive to negative)?
Reversing the polarity can lead to a surge of power and generate a large amount of heat, potentially damaging equipment or the battery itself.
Question 9 of 10
What type of electrical current is stored in a car battery?
Car batteries store and supply DC power.
Question 10 of 10
Why is it important to avoid getting a battery wet while handling it?
Water reduces the skin's resistance, allowing more current to flow through the body for a given voltage, increasing the risk of electric shock.
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