1. [1pt] Select the answers which complete the statements below (e.g., if answer
ID: 1420739 • Letter: 1
Question
1. [1pt]
Select the answers which complete the statements below (e.g., if answer A completes the first statement, and answer B the others, enter ABBBB).
A positive point charge is brought near the outside surface of a neutral conducting sphere and released. The initial position of the point charge is on the positive x axis and the sphere is centred on the origin. The point charge moves in the ____ x direction. (If the point charge does not move, select answer C.)
A positively charged ball is brought close to a neutral isolated conductor. The conductor is then grounded, while the ball is kept close. If the ground connection is first removed and then the ball is taken away, the conductor has a ____ charge.
Two neutral metal spheres are mounted on insulating supports. They are connected by a wire. A positively charged glass rod is brought near sphere 1. The wire connecting the spheres is removed and the charged rod is then taken away. Now the charge on sphere 1 is ____ .
A negatively charged glass rod attracts an object suspended by a non-conducting thread. The charge on the object is ____ .
A negatively charged glass rod repels an object suspended by a non-conducting thread. The charge on the object is ____ .
A) positive B) negative C) neutral D) cannot tellExplanation / Answer
as +ve charge comes near the neutral surface, it will attract free electron towards it.
so surface towards charge will become negatively charged and charge will move to
the surface.
surface is towards -ve side .
ANs ( B)
-------------------
as ball is brough closer, so conductor will get negative charge from ground.
when ground is connection is removed then extra charge will remain on conductor.
so conductor will be -ve charged.
B
------------------------------------------
rod is +ve charged.
so charge on sphere = -ve
B
---------------------
positive
A
----------------------------
negative
B
BBBAB
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