One end of a thin rod is attached to a pivot, about which it can rotate without friction. Air resistance is absent. The rod has

Answer:

200j

Work Done=Wieght×Speed

10×20

Answer:

Always equal to zero

Explanation:

In a action reaction two pair forces comes into play.

These forces are opposite in nature but equal. Suppose a pair of force is acting on any object.

Let the first force acting on one direction is -F

force  acting on opposite direction = +F

If we sum these forces, -F + (+F) = 0

Explanation:

Given that,

Dimensions of the rectangle is 0.52 m × 0.64 m

Magnetic field, B₁ = 2 T

Final magnetic field, B₂ = 0

Time taken, t = 0.49 s

The loop is inclined at an angle of 82° with respect to the normal to the plane of the loop.

(a) The average induced emf is given by :

(b)

Hence, this is the required solution.

Answer:

Inverted (displaced downwards)

Explanation:

The pulse becomes INVERTED upon reflecting off the boundary with the wall. That is, an upward-displaced pulse will reflect off the end and return with a downward displacement. This inversion behavior will always be observed when the end of the medium is fixed, like this wall in this instance. This INVERSION BEHAVIOR can also be observed when the medium is connected to another more heavy or more dense medium. And in this case, when the pulse reaches the end of the medium, a portion of the pulse will reflect off the end and return with an inverted displacement. The heavier medium acts like a fixed end to cause the pulse to be inverted.

Summary: a pulse reaching the end of a medium becomes inverted whenever it either:

i. reflects off a fixed end,

ii. is moving in a less dense medium and reflects off a more dense medium.