SINDH MDCAT 2017 PAPER

1. Which pair includes a vector quantity and a scalar quantity respectively?

2. A ball falls vertically and bounces on the ground. The following statements are about the forces acting while the ball is in contact with the ground. Which statement is correct?

3. A car is travelling with uniform acceleration along a straight road. The road has marker posts every 100 m. When the car passes one post, it has a speed of 10 m/s and when it passes the next one, its speed is 20 m/s. What is car’s acceleration?

4. A sample of an ideal gas may: I. expand adiabatically II. expand isothermally The net flow of heat into the gas from the exterior is:

5. With the usual notation, the first law of thermodynamics applied to one mole of an ideal gas can be written in the following form: CvT In a change for which Boyle’s law is obeyed, which of the following would necessarily be zero?

CvΔT=ΔQ-pΔV

In a change for which Boyles law is obeyed, which of the following would necessarily be zero ?

6. Four particles independently move at the same speed in a direction perpendicular to the same magnetic field. Which particle is deflected the most?

7. The circuit shows a network of resistors each of resistance R.

What is the effective resistance between the point X and Y ?

8. A row of 25 decorative lights, connected In series, Is connected to a main transformer. When the supply is switched on, the lights do not work. The owner uses a voltmeter to test the circuit. When the voltmeter is connected across the third bulb In the row, a reading of zero is obtained. Which of the following cannot be the only fault In the circuit ?

9. Charges of +2 µC and -2 µC are situated at points P and Q respectively, as shown below. X is midway between P and Q.

Which of the following correctly describes the electric field and the electric potential at point X ?

10. A fixed mass of gas In a thermally insulated container Is compressed. After compression, the temperature of the gas will have: