Which of these is a correct expression for the power of an electrical circuit? S
ID: 1773978 • Letter: W
Question
Which of these is a correct expression for the power of an electrical circuit? Select all of them that are right.
Question 2
A micro-tesla is 10-6 T, and Earth's magnetic field is about 50 micro-teslas. Suppose you have a long wire carrying 10 A of current and you bring up your compass to see if it can be made to deflect by the wire. As you bring it close, at what distance from the wire might you expect to see the compass move if it is sensitive to 20% of Earth's field?
1 cm or closer
2 meters or closer
20 cm or closer
10 meters or closer
Question 3
What is the resistance of a circuit operating at 84.2 V and delivering a current of 3.3 A? Give you answer in ohms.i
Question 2
A micro-tesla is 10-6 T, and Earth's magnetic field is about 50 micro-teslas. Suppose you have a long wire carrying 10 A of current and you bring up your compass to see if it can be made to deflect by the wire. As you bring it close, at what distance from the wire might you expect to see the compass move if it is sensitive to 20% of Earth's field?
1 cm or closer
2 meters or closer
20 cm or closer
10 meters or closer
Question 3
What is the resistance of a circuit operating at 84.2 V and delivering a current of 3.3 A? Give you answer in ohms.i
Explanation / Answer
Correct Options are
P equals I V
P equals V squared divided by R
P equals I squared R
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