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Mdcat-past-papers - IBA Quiz

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141. Consider these two vectors A=2i+3j and B=-6i+4j. The angle between these two vectors is:



142. A displacement time graph is a straight line inclined up at angle of 45° with X-axis, velocity of body according to this graph is:



143. A 150 kg car has its velocity reduced from 20 m/s to 10 m/s in 3.0 sec. How large was the average retarding force?



144. The phenomenon of interference of sound waves requires:



145. A gas expands from 1 m³ to 3 m³ at constant pressure of 2 Pa. Work done is:



146. If frequency of AC is doubled, the inductive reactance will:



147. The force between two charges is 28 N in vacuum. If paraffin wax of relative permittivity 2.8 is introduced between the charges as a medium, then the force reduces to:



148. A body moves along a semicircular path of radius 10 m from one end of the diameter to the other. The ratio of distance to displacement is:



149. A body is projected with speed v making an angle 0 with the horizontal and covers horizontal range R. If its speed is doubled, the new range will be:



150. A ball of mass m strikes a wall and rebounds with the same speed in the opposite direction, taking the initial direction as positive, the change in the momentum of the ball is:



151. A point lies 3m from a +5μC charge and 4m from a -3μC charge. The most appropriate direction of the net electric field at this point is directed:



152. The increase in kinetic energy associated with decreased pressure of a fluid in a horizontal pipe is a consequence of the:



153. The electric field at a point due to a point charge is 200N/C. If suppose a -4C test charge is placed at that point then the magnitude of electric field and electric force on it is:



154. Internal resistance reduces the terminal voltage because it:



155. The angle formed at the center of a circle as a body moves from one position to another is:



156. During the drilling of a metal surface the drill bit heats up. This heat comes from the:



157. If 2J of work is done in moving two coulombs of charge from one point to the other in an electric field. The potential difference between the points is:



158. The motion of transverse waves involves particle's vibration:



159. In laminar flow of fluid, its adjacent layers:



160. A body moving in a circle, half revolution in terms of radians is equivalent to: