2 of 5 5 consider the following situations: Situation I: A test charge +2q is br

Question

2 of 5 5 consider the following situations: Situation I: A test charge +2q is brought to a point a distance r away from a charge Q Situation 2: A test charge +q is brought to apoint a distance 2r from a charge Q. 5. Which of the following statements about the electric potential at the location of the point charges is TRUE? A) There is a higher electric potential at the location of the test charge in situation 1 than in the location of the charge in situation B) There is a lower electric potential at the location of the test charge in situation 1 than in the location of the charge in situation 2. C) The electric potential at the location of the test charge in situation 1 is the same as the electric potential at the location of the test charge in situation 2. D) One cannot make any comparison between the potentials at the location of the charges since the distanceris not given. 6. Which of the following is/are TRUE about a conductor in equilibrium? i. The electric field just outside the conductor is perpendicular to the surface. ii. The excess charge always resides at the surface of the conductor. iii. The potential everywhere inside the conductor is constant and equal to its value at the surface A) i and ii only B) i and iii C) ii and iii only D) i,ii, and iii

Explanation / Answer

Potential is due to Q charges and is positive for positive charges and negative for negative charges so definitely potential is higher in case of +Q charge or Situation2.

Moreover the test charges should always be small enough that they cannot produce any disturbance in Electric Field of Q charges. So 2q and q does not matter when they are test charges as they don't produce significant changes in E of Q charges.

6. Option d is correct as : If there is any tangential component of electric field on the surface it would act on charges and arrange them so as to minimize potential energy and then Electric field will no longer be tangential and only normal component would exist, this is what happens, initially E has both the components, in a fraction of second, charges get aligned and only normal component is left.

Bound charges are inside the medium, and excess charges stay outside.If charges are inside, they produce their own field and will align other electrons accordingly and thereby cancelling the effect.

Potential is same inside the conductor and is equal to its value at the surface. Value of potential should be same as that on surface as electric field is rate of change of Potential, as E is zero inside so potential must not change b/w surface and inside.

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