Sindh MDCAT 2026 Past Paper 141- In a diode, if the P-terminal is connected to the negative terminal of a battery (and N-terminal to positive), the diode is: A. Forward biasedB. Reverse biasedC. UnbiasedD. Short-circuited View Answer Answer : B. Reverse biased Description 142- The process of converting AC to DC is called: A. AmplificationB. RectificationC. ModulationD. Oscillation View Answer Answer : B. Rectification Description 143- Two waves are said to be "in phase" when they have: A. Same amplitude but opposite directionB. Different frequency but same amplitudeC. Same frequency but different peak valuesD. Same frequency and same peak value at the same time View Answer Answer : D. Same frequency and same peak value at the same time Description 144- In an atomic transition, if E₁ is a higher energy level and E₂ is a lower energy level, the energy of the emitted photon (hv) is given by: A. hv = E₂ – E₁B. hv = E₁ – E₂C. hv = E₁ + E₂D. hv = E₁ × E₂ View Answer Answer : B. hv = E₁ - E₂ Description 145- If the length of a conducting wire is increased (keeping material and temperature constant), its resistivity: A. IncreasesB. DecreasesC. Remains the sameD. Becomes zero View Answer Answer : C. Remains the same Description 146- According to Bernoulli's principle, if the pressure in a fluid flow increases, the velocity of the fluid: A. IncreasesB. DecreasesC. Remains constantD. Becomes zero View Answer Answer : B. Decreases Description 147- Capacitors allow AC to pass but block DC because: A. AC has higher voltage than DCB. The capacitor continuously charges and discharges with ACC. Capacitors have infinite resistance to ACD. DC has higher frequency than AC View Answer Answer : B. The capacitor continuously charges and discharges with AC Description 148- In an isolated system, which physical quantity remains conserved (the same)? A. VelocityB. TemperatureC. Total energyD. Momentum only View Answer Answer : C. Total energy Description 149- As a ball falls freely under gravity, its potential energy: A. IncreasesB. DecreasesC. Remains constantD. Becomes zero instantly View Answer Answer : B. Decreases Description 150- If the arc length of a circle equals its radius, the angle subtended at the center is: A. 1 radianB. 1 degreeC. 90 degreesD. π radians View Answer Answer : A. 1 radian Description 151- A person walks 5 km east and then 5 km south. Is the magnitude of the resultant displacement equal to 7 km? A. Yes, exactly 7 kmB. No, it is approximately 7.07 kmC. No, it is 10 kmD. No, it is 5 km View Answer Answer : B. No, it is approximately 7.07 km Description 152- A neutral atom has 11 electrons and a mass number of 23. How many neutrons does it contain? A. 10B. 11C. 12D. 23 View Answer Answer : C. 12 Description 153- The thief escaped __________ the window. A. FromB. OverC. OutD. Through View Answer Answer : D. Through Description 1 2 3 4 5 6 7 8
