Electric Current And Magnetism - Category Wise Question And Answer Practice Test With Solutions
ELECTRIC CURRENT AND MAGNETISM PRACTICE TEST [9 - EXERCISES]
Set 1
Set 2
Set 3
Set 4
Set 5
Set 6
Set 7
Set 8
Set 9
Question : 1
For electroplating a spoon, it is placed in the voltameter at
a) the position of cathode
b) exactly in the middle of anode and cathode
c) the position of anode
d) anywhere in the electrolyte
Answer »Answer: (a)
In electroplating, the metallic ions are positive, which are deposited on cathode.
Question : 4
Potential at any point inside a charged hollow sphere
a) is a constant
b) decreases with distance from centre
c) increases with distance
d) is zero
Answer »Answer: (a)
As, E = $ -{dV}/{dr}$ or, O= $- {dV}/{dr}$
Because electric field inside a charged hollow sphere is zero. or, v = constant
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