Answer:
a) 
b) 
Explanation:
Given that:
- mass of rod,

- length of the rod,

<u>(a)</u>
<u>Moment of inertia of rod about its center and perpendicular to the rod is given as:</u>



(b)
<u>Moment of inertia on bending the rod to V-shape of 60 degree angle and axis being perpendicular to the plane of V at the vertex.</u>
<em>We treat it as two rod with axis of rotation at the end and perpendicular to the plane of rotation. </em>
<em>So, the mass and the length of the rod will become half of initial value.</em>


![I=2[ \frac{1}{3}\times 0.2\times 0.3^2]](https://tex.z-dn.net/?f=I%3D2%5B%20%5Cfrac%7B1%7D%7B3%7D%5Ctimes%200.2%5Ctimes%200.3%5E2%5D)

Electronic signals are converted into a 'ray of light' -
The power of the lens is 2 diopter means that this lens has a focal length of 1/2 meter.
The focal length = 1 ÷ ( the number of diopters)
If one's glass prescription shows that the power of the lens is 2 diopter it means that the person is far-sighted. It means if a person needs to see something which is quite distant then his eyes need extra lens power to focus on it. Moreover, if there's a sign convention it means '+' indicates a convex lens and '-' concave lens. Also in-camera close up lens are also measured in terms of diopter.
I hope this answer helps.
To learn more about lenses,
brainly.com/question/766997
brainly.com/question/17014859
Answer:
(a) 4.0334Ω
(b)parallel
Explanation:
for resistors connected in parallel;

Req =3.03Ω , R1 =12.18Ω



R2=1/0.2479
R2=4.0334Ω
(b)parallel connection is suitable for the desired total resistance. series connection can not be used to achieve a lower resistance as the equation for series connection is.
Req = R1+R2