Question

in case of an electrical fire you should do all of the following except * 1 point
call the fire department
use an abc fire extinguisher
switch the main breaker off
pour water on the flames

the electric company bills customers based on the ___ used. * 1 point
voltage
energy
current
power

1 kilowatt-hour = t joules * 1 point
3.6 trillion
3.6 million
3.6 billion
3600

Explanation:

First Question

Water is a conductor of electricity. Pouring water on an electrical fire can cause electric shock and spread the fire. Calling the fire department, using an ABC fire extinguisher (which can handle electrical fires as it is non - conductive), and switching the main breaker off (to cut off the power source) are all appropriate actions.

Electric companies bill customers based on the amount of energy consumed. Voltage is the electric potential difference, current is the flow of electric charge, and power is the rate of energy transfer. But the billing is based on the total energy (measured in kilowatt - hours in common billing) used over a period.

We know that \(1\space kW = 1000\space W\) and \(1\space hour=3600\space s\). Using the formula \(E = P\times t\) (where \(E\) is energy in joules, \(P\) is power in watts, and \(t\) is time in seconds). Substituting \(P = 1000\space W\) and \(t = 3600\space s\), we get \(E=1000\times3600 = 3.6\times10^{6}\space J\) (since \(1\space million = 10^{6}\)).

Answer:

Pour water on the flames

Second Question