26 March

1. Potential energy of two charge system do not depend on choice of zero potential.

2. If electric field at a point is zero, electric potential at that point should be zero

3. If electric potential at a point is zero, electric field at that point should be zero.

How many correct???

• 1

• 2

• 3

• None

1. As we go in the direction of electric field, electric potential must decrease.

2. If a positive charge is shifted from a low potential region to a high potential region, its electric potential energy must increase.

3. Gauss law is applicable everywhere.

How many wrong??

• 1

• 2

• 3

• None

In a system of charges placed in wax, there are 3 charges A,B and C. Write T for true and F for false.

1. Force on A due to B and C does not depend on permittivity of wax.

2. Force on C do not depend on permittivity of wax

3. Force on B due to A do not depend on magnitude of C

4. Force on A depends on permittivity of wax.

• F T T T

• F T T F

• T F T T

• T T T F

1. Capacitance of a capacitor does not depend on shape of the plates.

2. Capacitance of a capacitor does depend on charges on the plates

3. Direction of electric potential at a point is tangential to the lines of force

True/false

• T T F

• T T T

• F F F

• T F F

1. Electric field can't accelerate charge

2. Electric field is in direction of force on positive charge

3. Electric field has a unique property of taking 90° turn

True/False

• F F T

• F T T

• F T F

• All false