True. Electromagnetic energy does not require a medium.
Answer:
Yes, there a link between number of bulbs and current drawn from the power pack.
Explanation:
In an Electrical circuit, we have resistors present in that circuit. These resistors can be connected in two ways.
a) Series connection
b) Parallel connection
There is a link or a relationship between number of bulbs and the current drawn from the power pack. This is because the number of bulbs is equivalent to or equal to the number of resistors.
Hence,
a) In a series connection, the link or relationship between the number of bulbs(resistors) is as the number of light bulbs increases, the current in the power pack (circuit) decreases.
b) In a parallel connection, the link or relationship between the number of bulbs(resistors) is as the number of light bulbs increases, the current in the power pack (circuit) increases.
Answer:
a) The force between the two wires is attractive.
b) (F/L) = (μ₀I²)/(2πd)
Explanation:
a) According to Ampere's law, current in the same direction attract, while current in opposite directions repel. So, for this case of two wires carrying curremt in the same direction, the force between the wires is attractive.
b) The force of attraction between two current carrying wires carrying currents of magnitude I₁ and I₂ respectively, at some distance d, apart is given as
F = (μ₀ I₁ I₂ L)/(2πd)
(F/L) = (μ₀ I₁ I₂)/(2πd)
I₁ = I₂ = I
(F/L) = (μ₀I²)/(2πd)
Hope this Helps!!
The average human body temperature is around 37 degrees Celsius.
So, this is 72 degrees away from the normal body temp.
Complete text of the problem:
"Two point charges lie on the x axis. A charge of + 2.20 pC is at the origin, and a charge of − 4.60 pC is atx=−13.0cm.
What third charge should be placed at x=+26cm so that the total electric field at x=+13.0cm is zero?
Express your answer to three significant figures and include appropriate units"
Let's call A the point at x=+13 cm where the total electric field is zero.
First of all, we can calculate the total field generated by the two charges
and
. The two charges have a distance from point A of
and
, respectively. The field generated by the positive charge heads towards right in point A, while the one generated by the negative charge heads towards left, so we should consider a sign - on this field. Therefore, the total field generated by charge 1 and 2 in A is

In order to have total net field of zero in point A, the field generated by charge 3 should be equal to this value, and should point towards the left, so it must be a positive charge. So, we have:

where
is the distance of the charge 3 from point A. So we find
