Which of the following is a true statement about magnetic fields
1 answer:
a. the larger the current, the larger the magnetic field
Explanation:
The magnetic field produced by a current-carrying wire is given by the equation:
where
is the vacuum permeability
I is the current in the wire
r is the distance from the wire at which the field strength is calculated
From the equation, we notice the following points:
- The strength of the magnetic field is directly proportional to the current in the wire
- The strength of the magnetic field is inversely proportional to the distance from the wire
Therefore, the only correct option in the list is
a. the larger the current, the larger the magnetic field
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The cost of excavating a space of 84 ft long, 42 ft wide, and 9 ft deep is $45864
Information about the problem:
- Space long= 84 ft
- Space wide= 42 ft
- Space deep= 9 ft
- Cost by yard3 = $39/yd3
- Total cost= ?
To solve this problem, we have to state the equation using the information of the problem:
Calculating the volume of the total space:
space volume = space long * space wide * space deep
space volume = 84 ft * 42 ft * 9 ft
space volume = 31752 ft3
By converting the volume from ft3 to yd3, we have:
31752 ft3 * (0,037037 yd3 / 1 ft3) = 1176 yd3
Calculating the cost of excavating the volume space:
Total cost = space volume * cost by yard3
Total cost = 1176 yd3 * $39/yd3
Total cost = $45864
<h3>What is volume?</h3>It is the space occupied by a body, it is calculated by multiplying its dimensions, for example: length, height and width.
Learn more about volume at: brainly.com/question/12628341
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