Internal for S4 mathematics

1 Coulomb is equivalent to

• 6 x 10^17 Charges
• 6 x 10^18 Charges
• 6 x 10^19 Charges
• 6 x 10^20 Charges

Work done in moving a positive charge on an equipotential surface is ...........

• Finite and positive

• Finite and negative

• Infinite

• Zero

The electric potential in a region of space is given by the function V=3x² + 2y³. what is the x-component of the electric field in this area?

• 6x
• -6x
• x³
• -x³

Negative charges only move. True or false?

• True

• False

If voltage applied on a capacitor is increased from V to 2V, choose the correct option

• Charge remains same and capacitance is doubled

• Both charge and capacitance are doubled

• Capacitance remains same and charge is doubled

• Both charge and capacitance remai same

What happens to the electric field inside a capacitor when the distance between the plates is halved keeping the voltage constant

• Remains the same

• It is doubled

• It is halved

• none of the above

The factors on which the capacitance of a parallel plate capacitor depends are

1. 1. Area of the capacitor plate

2. 2. Distance between the plates

3. 3. Nature of the dielectric medium

• only 1 and 2 are correct

• only 2 and 3 are correct

• only 1 and 2 are correct

• All are correct

A neutral point in an electric field is a point at which

• Electrostatic potential is zero

• Net electric field is zero

• Force experienced by a test charge is zero

• none of the above

Gauss's law is always true but not always useful. True or false?

• True

• False

Read the following statements and answer.

1. 1. Two electric lines of force never intersect.

2. 2. Electrostatic field lines of two unlike charges expand laterally.

3. 3. Electrostatic field lines begin from positive charges.

• Only option 1 is correct

• 1 and 3 are correct

• only option 2 is correct

• Only option 3 is correct