The main light gathering device of a refractor telescope is
1 answer:
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Explanation:
The given data is as follows.
Resistance (R) = 1200 ohm, Area (A) = m (as
)
Diameter (d) = 2.3 mm = m
First, we will calculate the length as follows.
R =
Here, = resistivity of aluminium =
Putting the given values above and we will calculate the value of length as follows.
R =
1200 =
L =
As the circumference of circular wire =
or, =
=
And, number of turns will be calculated as follows.
No. of turns × Circumference = Length of wire
No. of turns ×
=
Thus, we can conclude that turns of wire are needed.
Given data
*The given mass of the pendulum is m = 3 kg
*The given height is h = 0.3 m
The formula for the maximum speed of the pendulum is given as
*Here g is the acceleration due to the gravity
Substitute the values in the above expression as
Hence, the maximum speed of the pendulum is 2.42 m/s