131. Selenium becomes a conductor in light so it behaves like____________?
A. Semiconductor
B. Photodiode
C. Light emitting diode
D. Capacitor

132. If an electrons is allowed to move along the field in a non uniform electric field then it will follow__________________?
A. Spiral path
B. Straight line
C. Curved path
D. Circular path

133. If mica sheet is placed between the plates of a capacitor the capacity_______________?
A. increases
B. decreases
C. increases then decreases
D. decreases then increases

134. If two charges are increased by two times then force_____________?
A. Decreases 9 times
B. Increases 9 times
C. Increases 4 times
D. Decreases 4 times

135. If metallic conductor is charged negatively then its weight______________?
A. Remains same
B. First increases then decreases
C. Decreases then increases
D. Increases for a while

136. The force per unit charge is know as__________________?
A. electric flux
B. electric intensity
C. electric potential
D. all of above are same

137. An electric charge at rest produces_______________?
A. only a magnetic field
B. only an electric field
C. neither electric field nor magnetic field
D. both electric and magnetic fields

138. Electric intensity being a vector quantity always points_______________?
A. along the direction of force experienced by a unit positive charge
B. opposite to the direction of force experienced by a unit positive charge
C. perpendicular to the direction of force experienced by a uit positive charge
D. any of above

139. A closed surface contains two equal and opposite charges. The net electric flux from the surface will be________________?
A. negative
B. positive
C. zero
D. data is insufficient

140. Two similar charges each of one coulomb placed in air one meter apart repel each other with a force______________?
A. 9 x 109N
B. 9.2 x 104N
C. 9 x 109N
D. 9 x 107N