# PHY101

## Category:PHY101

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PHY101

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A. One of these is NOT a basic assumption of kinetic theory of ideal gases

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B. The velocity of a particle moving with simple harmonic motion is ____ at the mean position.

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

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

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E. Two forces act on a point object as follows: 100 N at $170^{o}$ and 100N at $50^{o}$. Find the resultant force

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F.  The speed of 90 hm/hr is equal to ------------------ m/s

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G. 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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H. 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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I.  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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J. A piece of stone has mass 80kg and density of 0.10 kg per meter cube. What is its volume in meter cube?

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

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

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

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N. 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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O. A _______ consists of two equal and opposite parallel forces.

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

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Q. 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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R. 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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S. Forces are called coplanar when all of them acting on body lie in one _____.

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T. What is common to the variation in the range and the height of a projectile?

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

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V. Given that the specific capacity of ice is one-half that of water, does is take more thermal energy to raise the temperature of 5 g of water or 5 g of ice by $$6^{o}C?$$

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W. A perfectly ____ body is defined as one which emits every wavelength with the maximum energy for each wavelength for the particular temperature of the body.

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

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

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Z.  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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AA.  Which of the following statements is not correct about reference frames?

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AB.  A body hangs from a spring balance supported from the roof of an elavator. If the elavator has an upward acceleration of $3ms^{-2}$ and the balance reads 50 N, what is the true weight of the body?

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AC. 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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AD.  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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AE.  The absolute zero temperature refers to the temperature at which _____

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AF. The main condition for the rigid body is that the distance between various particles of the body does not ____.

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AG.  Which of the following is NOT true?

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

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AI.  The resultant of vectors $vec{A}$ and $vec{B}$ has a magnitude of 20 units.$vec{A}$ has a magnitude of 8 units, and the angle between $vec{A}$ and $vec{B}$ is $40^{o}$. Calculate the magnitude of $vec{B}$

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

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AK. What is the unit of impulse?

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AL.  Which of these is correct about viscosity?

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

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AN. _______ is that which enables a body to perform work.

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

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

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AQ.  Which of the following contributes to the instability of an object?

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AR. 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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AS.  The trajectory of a projectile is ________

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AT. 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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AU. Applied force is proportional to extension produced is a statement of ____ law.

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AV.  A 50kg boy suspends himself from a point on a rope tied horizontally between two vertical poles. The two segments of the rope are then inclined at angles 30 degrees and 60 degrees respectively to the horizontal.The tensions in the segments of the rope in newtons are ______

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

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AX.  The motion of a ball rolling down a ramp is one with ________

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AY.  A man leaves the garrage in his house and drives to a neighbouring town which is twenty kilometres away from his house on sight-seeing. He returns home to his garrage two hours after. What is his average velocity from home in km/h?

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AZ.  Which of the following is NOT an effect of heat on a substance?

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BA. 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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BB.  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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BC. 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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BD. 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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BE.  An ungraduated mercury thermometer attached to a millimeter scale reads 22.8mm in ice and 242mm in steam at standard pressure. What will the millimeter read when the temperature is 20^{o} C?

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

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BG. 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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BH. Gases occupy volume of the __________.

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

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BJ. FBQ25: A ________ is the turning effect caused by a couple.

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BK. Which of the following is NOT a thermometric property?

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

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BM.  A boy intends to move an m-kg crate across the floor by applying a constant force P newtons on it.The coeficient of friction between the floor and the crate is $mu$. Which of these is the best option for his task?

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

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

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

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

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