Part 1 1. Which of the following is false about electric field for dipole kept at origin along +x axis a. Electric field at (5,0) is along +x axis b. Electric field at (-2,0) is along +x axis c. Electric field at a point between the dipole is along +x axis d. None of the above 2. An electric field 7 N/C exists at an angle 45° with +x axis. Find the potential difference between (0,0) and (4,0) a. zero b. 20V 3. Assertion: Like charges always repel each other c. 28V d. 7V Reason: the above statement is true for all types of like charges, it is the fundamental law of nature a. Both A & R are true and R is the correct explanation of A b. Both A & R are true and R is not the correct explanation of A c. A is true, R is false d. A and R, both are false 4. Two charges 4C and -1C are kept at origin and (5,0). Find the point of zero electric field. 5. Draw three equipotential surface of voltage 6V, 5V and 4V for a positive point charge. Part 2 6. For which of the following dependence of drift velocity electric field E is Ohm's law obeyed. (a) va < VE (b) va x E (c) Vd α E² (d) Vd constant 7. The current density (number of free electrons per m³) in metallic conductor is of the order of (a) 1022 (b) 1024 (c) 1026 (d) 1028