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Mdcat-past-papers - UHS Quiz

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21. A carbon resistor is connected to a 50V battery and passes 2A current. If voltage is increased to 75V, the current will be:



22. Energy consumed by a 60W bulb in 2 minutes is:



23. A potential difference is applied across a wire of length l and radius r, and current I flows. If another wire of same material with length 2l and radius 2r is used, then current will be:



24. A particle carrying charge 5e falls through a potential difference of 25V. Energy gained by particle is:



25. Calculate the rate of energy transfer when 220V mains supply gives 0.1A to a LED:



26. According to maximum power transfer theorem, the maximum power delivered by battery to output is:



27. A low voltage supply with an emf of 20V and an internal resistance of 1.5 ohms is used to supply power to a heater of resistance 6.5 ohms in a fish tank. What is the power supplied to the water in the fish tank?



28. Arshad is driving down 7th street, he drives 150 m in 18 s. Assume he does not speed up or slow down, what is his speed?



29. The ratio of displacement along diameter of circle and total distance along circle is:



30. A wave traveling with speed of 130 ms⁻¹ having wavelength of 5 m. What is its frequency?



31. A cyclist is traveling at 15 ms⁻¹. She applies brakes so that she does not collide with the wall in front of her at a distance of 18 m. Calculate the magnitude of deceleration.



32. A fireman wants to slide down a rope. The breaking load of the rope is 3/4th of the weight of the man. With what acceleration should the fireman slide down? (Acceleration due to gravity is g)



33. The instantaneous velocity along the curved path is:



34. If slope of velocity-time graph is not constant at different points then body is moving with:



35. What is the shape of velocity-time graph for constant acceleration?



36. Plasma membrane is chemically composed of:



37. The --- model of plasma membrane suggests that proteins are embedded in lipid bilayer:



38. The intake of liquid materials across the cell membrane is:



39. Fluid mosaic model of plasma membrane states that protein molecules float in a fluid-layer:



40. The rapid exchange of materials through carrier protein across the plasma membrane is called:



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