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Syllabus
24. A tall vertical cylinder filled with water is kept on a horizontal table top. Two small holes A and B made on the wall of the cylinder, A near the middle and B just below the free surface of water. State and explain your observation.
(a) 10 N
(b) 3 N
(c) 4 N
(d) 2.5 N
(a) 0.1 %
(b) 0.2%
(c) 0.4%
(d) 0.01%
Find the distance.
18. Two large conducting plates are placed parallel to each
other with a separation of 2 cm between them. An electron
starting from rest near one of the plates reaches the other
plate in 2 . Find the surface charge density of the plate.
[Ans. 2-52 x 10-13 Cm-2]
19. In problem no. 17, if the two conducting plates are replaced
by two sheets of charge ,what will be the charge density of
the sheets of charge ?
[Ans. 5.04 x 10-13 Cm-2]
Q.1. Name the different radiations that are emitted from the nucleus of a radioactive substance. Are all the radiations mentioned by you, emitted in a single radioactive decay?
Q. Which of the following pairs of elements is a pair of isobar?
A)24 ohm
B)100 ohm
C)50 ohm
D)240 ohm
15. In problem no. 13, if the sheet of charge is replaced by a conducting charged plate, what will be the force of attraction between the particle and the plate. [ Ans. 1-694 N (attractive)]
Cculate the momentum of the ball as it leaves the golf club
Q.10.(a)(ii) When an alpha particle gains two electrons it becomes neutral and becomes an atom of an element which is a rare gas. What is the name of this rare gas?
(b)(ii) What happens inside the nucleus that causes the emission of beta particle?
(iii) Express the above change in the form of an equation.