Electrical Power And Electrical Energy

Question 1

What are the units of electrical energy?

Answer 1

Ampere - electrical current
Volt - voltage 
Watt - electrical power
Milliwatt - 1000th of a watt
Kilowatt - 1000 x watt

Question 2

Differences between a series and parallel circuit?

Answer 2

1. Series circuits are basic types of electrical circuits in which all components are joined in a sequence so that the same current flows through all of them.
2. Parallel circuits are types of circuits in which the identical voltage occurs in all components, with the current dividing among the components based on their resistances, or the impedances.
3. In series circuits, the connection or circuit will not be complete if one component in the series burns out.
4. Parallel circuits will still continue to operate, at least with other components, if one parallel-connected component burns out.

Question 3

Where is a voltmeter placed in a working circuit?

Answer 3

The voltmeter is connected in parallel to the globe.

Question 4

Where in a circuit should an ammeter be placed?

Answer 4

An ammeter does not effect the voltage or current and therefore can be placed any where around a series circuit or wherever you want to measure the current.