WorksheetsElectricity and the Human Body Quiz
Total questions: 30
Worksheet time: 30mins
What is the unit of electrical resistance?
Volt
Ampere
Ohm
Watt
The symbol for ohms is:
W
S
Ω
V
What is the unit for electric current?
Watt
Ampere
Ohm
Joule
Which of the following factors does NOT affect the intensity of an electric shock?
Resistance
Voltage
Body temperature
Current
The lower the body’s resistance, the:
Smaller the shock
Greater the chance of severe shock
Slower the current flow
Less harmful the voltage
What is the approximate resistance of damp skin (hand to hand)?
900 Ω
9,000 Ω
90,000 Ω
700,000 Ω
Dry skin resistance (hand to hand) can range from:
900 Ω to 7,000 Ω
90,000 Ω to 700,000 Ω
1 Ω to 10 Ω
700,000 Ω to 1,000,000 Ω
Which law relates voltage, current, and resistance?
Newton’s Law
Ohm’s Law
Hooke’s Law
Faraday’s Law
In Ohm’s Law, V = I × R, R stands for:
Resistance
Rotation
Rate
Range
Voltage is measured in:
Watts
Ohms
Volts
Amperes
Birds can sit on electrical wires without being electrocuted because:
They have rubber feet
They are grounded
There is no potential difference across their bodies
They are immune to electricity
People get electrocuted on transmission lines when they:
Wear gloves
Create a path for current to ground
Stand still on the wire
Avoid touching the pole
Which body condition increases risk of severe electric shock?
Dry skin
Damp or sweaty skin
Wearing shoes
Cold weather
Electrical current is measured in:
Volts
Watts
Ohms
Amperes
The SI unit for electric charge is:
Joule
Coulomb
Newton
Volt
The human body’s resistance is lowest when:
Wearing rubber gloves
Skin is dry
Skin is wet
Standing on wood
In electrical safety, “grounding” means:
Wearing rubber boots
Connecting to the Earth
Standing still
Touching two wires at once
A shock becomes more dangerous if:
Current bypasses the heart
Current passes through the heart
You use insulated tools
You touch with one hand only
Which formula represents Ohm’s Law?
P = V × I
V = I × R
F = m × a
Q = m × c × ΔT
One volt is equal to:
One joule per coulomb
One ampere per ohm
One watt per ampere
One coulomb per second
Why is higher voltage more dangerous?
It lowers current
It increases potential current flow
It reduces power
It stops grounding
The SI stands for:
Standard International
Systeme International d’Unites
Scientific Index
Signal Indicator
The SI unit for power is:
Watt
Ohm
Volt
Ampere
The SI unit for energy is:
Watt
Joule
Newton
Ampere
Which one is a safe practice when working near electricity?
Touch wires to check if they’re live
Use insulated tools
Work with wet hands
Stand barefoot on concrete
What happens if a bird touches both wires at once?
Nothing happens
It gets electrocuted due to voltage difference
It flies away safely
Current flows but doesn’t harm it
If skin resistance is 90,000 Ω and voltage is 90 V, what is the current? (I = V / R)
0.001 A
0.01 A
0.9 A
1 A
Which is the main reason humans are at higher risk than birds on wires?
Birds are lighter
Humans often touch ground or two points with different potentials
Birds are faster
Humans are taller
Which part of the body is most dangerous for current to pass through?
Fingers
Toes
Heart
Hair
Which situation is LEAST likely to cause an electric shock?
Touching live wire with wet hands
Standing barefoot in water while touching a plug
Wearing rubber-soled shoes and insulated gloves
Holding a metal rod that touches a power line
