# PHY101

## Category:PHY101

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ATTENTION:

Kindly note that you will be presented with 50 questions randomized from the NOUN question bank. Make sure to take the quiz multiple times so you can get familiar with the questions and answers, as new questions are randomized in each attempt.

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PHY101

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1. The coefficient of limiting static friction is the ratio of the ____ to the normal force.

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2. The ____ of the instantaneous centre of a moving rigid body is called centroid.

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3. If a force of 40N acting in the direction due East and a force of 30N is acting in the direction due North. Then the magnitude of the resultant forces will be ___________.

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4. __________forces meet at one point and have their lines of action in different planes.

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5. The _______ occurs when the driving frequency is the same as the natural frequency of the oscillator.

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6. A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true?

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7. When trying to turn a key into a lock, ____ of forces are applied.

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8.  A rope suspended from a ceiling supports an object of weight W at its opposite end. Another rope tied to the first at the middle is pulled horizontally with a force of 30N. The junction P of the ropes is in equilibrium. Calculate the weight W and the tension T in the upper part of the first rope

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9.  A stone thrown from ground level returns to the same level 4 s after. With what speed was the stone thrown? Take $g = 10ms^{-2}$

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10.  What are the dimensions of power (time rate of change of expending energy)

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11. The specific latent heat of vapourization of a liquid is the quantity of heat in joules required to change 1kg mass of the liquid at its _______to gas at the same temperature.

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12. The statement "the specific latent heat of fusion of ice is $3.3times 10^{5}$J/kg" means ______

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13. According to principle of moment, if a system of coplanar forces is in equilibrium, then the algebraic ____of their moments about any point in their plane is zero

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14. The frictional force in fluids is known as ___________

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15. The general motion of a rigid body is a combination of ________and rotation.

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16. Given three vectors $vec{a} = {-}vec{i}{-}4vec{j}+2vec{k}$, $vec{b} = 3vec{i}+2vec{j}-2vec{k}$, $vec{c} = 2vec{i}{-}3vec{j}+vec{k}$, calculate $vec{a}cdot(vec{b}timesvec{c})$

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17. A _______ consists of two equal and opposite parallel forces.

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18. When the junctions of two dissimilar metals are maintained at different temperatures an electromotive force is is set up in the circuit of which these junctions are a part. A pair of junctions of this kind is known as _____________

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19. When an object is in thermal equilibrium, it is losing and gaining heat at ____ rates.

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20. Which of the following substances has the highest viscosity at room temperature?

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21. A wire of cross-sectional area of $6times10{-5}m^{2}$ and length 50cm stretches by 0.2mm under a load of 3000N. Calculate the Young’s modulus for the wire

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22. According to the kinetic-molecular theory, particles of matter are in motion in both gas and _____.

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23.  A string of natural length L extends to a new length L' under tensile force F. If Hooke’S law applies, the work done in stretching the spring is ------------

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24. The method of mixtures as a means of measuring the amount of heat of a substance depends of the principle of conservation of ______

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25. Thermal expansion of a solid material depends on the following EXCEPT __________

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26. A mass accelerates uniformly when the resultant force acting on it

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27. A wall or partition that allows free exchange of heat energy between two systems is referred to as --------------

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28.  The molecules of a liquid are held together by what type of forces?

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29. A Null vector is a vector whose magnitude is __________.

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30. Radius of _________ is the radial distance from any given axis at which the mass of a body is concentrated without changing the moment of inertia of the body about that axis.

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31. Gases occupy volume of the __________.

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32. The term that best describes the need to hold the butt of a riffle firmly against the shoulder when firing to minimise impact on the shoulder is ________

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33.  Tin melts at 232 under standard atmospheric pressure. Express this temperature in kelvin

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34. Instantaneous velocity is the velocity of a particle at some _____of its path.

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35. An electric kettle contains 1.5 kg of water at $$100 ^{o}$$ and powered by a 2.0 kW electric element. If the thermostat of the kettle fails to operate, approximately how long will it take for the kettle boil dry? (Take the specific latent heat of vaporization of water as $2000kJkg^{-1})$

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36. Calculate the root-mean-square velocity of oxygen molecules at room temperature, 25 oC. Given that molar mass of oxygen and molar gas constant are 31.9998 g/mol and 8.3143 J/mol K, respectively in meter per second.

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37. One of these is an example of thermal radiation detector

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38. The rise in the level of a liquid in a tube is h. If half the amount is poured outside, what will be the new rise in the liquid level?

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39. When a gas is allowed to expand at constant _____the process is described as isothermal.

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40. An object is shot from the ground at 75m/s at an angle of 45 degrees above the horizontal. How high does the object get before beginning its descent?

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41.  A ball is kicked and flies from point P to Q following a parabolic path in which the highest point reached is T. The acceleration of the ball is _______

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42.  A cart is moving horizontally along a straight line with constant speed of 30 m/s. A projectile is fired from the moving cart in such a way that it will return to the cart after the cart has moved 80 m. At what speed (relative to the cart) and at what angle (to the horizontal) must the projectile be fired?

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43. The physical pendulum is any real pendulum in which all the mass is taken to be concentrated at a_____.

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44. An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it is thrown? Take $g = 10ms^{-2}$

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45. On what thermometric property does the working of a thermistor depend?

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46.  In which of the following phenomena is surface tension important?

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47. Which of the following physical concepts best explains why passengers in fast moving cars should always fasten their seat-belts?

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48.  The amount of heat stored in a substance depends on all of the following EXCEPT _______

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49. 3-vectors are only properly represented in a 3-dimensional _____.

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50. The heat required to raise the temperature of the body through 1K is called _______.

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