Consider the conducting spheres labeled A, B, and C shown in the drawing. The sp
ID: 2077775 • Letter: C
Question
Consider the conducting spheres labeled A, B, and C shown in the drawing. The spheres are initially charged as shown on the left, then wires are connected and disconnected in a sequence shown moving toward the right. What are the final charge on spheres A, B and C respectively at the end of the sequence? A) +Q, +Q, +Q B) + Q/4, +Q/4, +Q/2 C) + Q/8, +Q/8, +Q/4 D) + Q/4, +Q/4, +Q/4 E) + Q/8, +Q/8, +Q/2 Which of the arrows best represents the direction of the net force on charge +Q due to the other two +2Q and +Q charges in distance d? A) B) C) D) E) Choose the correct statement concerning electric field lines and equipotential lines: A) field lines may cross and equipotential lines may cross B) field lines are far away where the field is weak and the equipotential line has the same electric field in magnitude and the direction. C) field lines point away from negatively charged particle and equipotential lines are perpendicular to field lines D) field lines point toward to positively charged particle and equipotential lines are parallel to field lines E) field lines are close together where the field is week and the equipotential line has the same electric field in magnitude and the direction One electron (p_1)and one proton (p_2) are placed on the x axis, as shown below. The directions of the electric field at points 1, 2, and 3 respectively, are: A) leftarrow, leftarrow, rightarrow B) leftarrow, rightarrow, leftarrow C) leftarrow, rightarrow, rightarrow D) leftarrow, leftarrow, leftarrow E) rightarrow, leftarrow, rightarrowExplanation / Answer
4.) Redistribution of charges is a funvtion of their radius, charge flows from high to low potential.
So, C IS CORRECT.
5.) Field lines never cross, if they crossed, it would have 2 directions of E field.
5.) 2Q charge will exert greater force than Q charge.
So, force will have a direction,whose component is more along x direction (opposite to 2Q). D IS CORRECT.
6.)
Field lines point towards negative charge, away from positive charge.
Field lines are close where field is strong.
Equipotential lines are normal to field lines at each point.
They have same magnitude but not same direction.(Consider case of point charge, equipotential lines encirles the charge, so field has same magnitude everywhere on field line,. But direction is radially outwards.
B IS ALMOST CORRECT. OTHERS ARE WRONG.
7.)
Electron has field pointing the charge, proton's field points outwards, so, at 1 its along right, as 2 is close to proton, so net field is along left, at point 3, it also points in right as it is close to proton.