SaraNextGen Study App [2022-23]
Last Updated On 23-10-2022 - By Sara

Four equal point charges Q each are placed in the xy placed at (0, 2), (4, 2), (4, −2) and (0, −2). The work required to put a fifth charge Q at the origin of the coordinate system will be:

(a)

(b)

 

(c)

(d)


Question ID - 50281 :-

Four equal point charges Q each are placed in the xy placed at (0, 2), (4, 2), (4, −2) and (0, −2). The work required to put a fifth charge Q at the origin of the coordinate system will be:

(a)

(b)

 

(c)

(d)

1 Answer
5876 Votes
3537

Answer Key : (b) -

Potential at origin=

(Potential at

=KQ Work required to put a fifth charge Q at origin is equal to



Next Question :

 A cylindrical plastic bottle of negligible mass is filled with 310 ml of water and left floating in a pond with still water. If pressed downward slightly and released, it starts performing simple harmonic motion at angular frequency . If the radius of the bottle is 2.5 cm then  close to: (density of water =103 kg/m3)

(a)

5.00 rad s−1

(b)

1.25 rad s−1

(c)

3.75 rad s−1

(d)

7.95 rad s−1


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