5.1 Use of Electricity at Work – Hazards and Risks

Question 1

Electron flow along a conductor is called

Answer 1

current

Question 2

The difference in positive and negative potential between the terminals of a power supply (potential difference) is measured in units of

Answer 2

volts

Question 3

The resistance of a conductor is measured in

Answer 3

ohms (Ω)

Question 4

There is a direct relationship between voltage, current and resistance. If a circuit has a resistance (R) of 1 ohm and a voltage (V) of 1 volt is applied a current (I) of 1 ampere will flow.What is the above known as?

Answer 4

Ohms Law

Question 5

An analogy can be drawn between electricity flowing in a circuit and water flowing through a pipe.  The water pressure equates to

Answer 5

the voltage

Question 6

An analogy can be drawn between electricity flowing in a circuit and water flowing through a pipe.  The water flow rate equates to

Answer 6

the current

Question 7

An analogy can be drawn between electricity flowing in a circuit and water flowing through a pipe. The pipe material equates to

Answer 7

the resistance

Question 8

An analogy can be drawn between electricity flowing in a circuit and water flowing through a pipe. A water pump compares to

Answer 8

a DC battery

Question 9

Hazards, Risks and Danger of Electricity These can be remembered as B-SAFE. What does it stand for?

Answer 9

Burns
Shock
Arcing
Fire
Explosion