Category: PHY101 0 PHY101 1 / 50 The _____of oscillations of a particle in simple harmonic motion is damped by resistive forces due to the surrounding medium. Check 2 / 50 Which of the following is NOT a thermometric property? the volume of a liquid the electrical resistance of a conductor the density of a liquid the pressure of a gas at constant volume 3 / 50 What is common to the variation in the range and the height of a projectile? horizontal acceleration time of flight vertical velocity, horizontal acceleration vertical velocity horizontal velocity 4 / 50 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. Check 5 / 50 Instantaneous velocity is the velocity of a particle at some _____of its path. Check 6 / 50 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? The passenger is in motion relative to the passer-by Both observers are in motion relative to each other The passer-by is in motion relative to the passenger The passer-by is stationary relative to the passenger 7 / 50 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? Check 8 / 50 A piece of stone has mass 80kg and density of 0.10 kg per meter cube. What is its volume in meter cube? Check 9 / 50 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 ___________. Check 10 / 50 The fundamental interval of a thermometric scale is ______ the difference between the upper and the lower fixed points the temperature scale below the upper fixed point above the upper fixed point 11 / 50 Â The motion of a ball rolling down a ramp is one with ________ increasing acceleration constant speed constant acceleration decreasing acceleration 12 / 50 When an object is in thermal equilibrium, it is losing and gaining heat at ____ rates. Check 13 / 50 Â 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? 35.8 m/s at 24 degrees 38.6 m/s at 54 degrees 27 m/s at 35 degrees 24 m/s at 44 degrees 14 / 50 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 _____________ thermocouple resistance thermometer thermistor pyrometer 15 / 50 When trying to turn a key into a lock, ____ of forces are applied. Check 16 / 50 Two forces act on a point object as follows: 100 N at $170^{o}$ and 100N at $50^{o}$. Find the resultant force 100 N at $110^{o}$ 110 N at $100^{o}$ 110 N at $50^{o}$ 100 N at $50^{o}$ 17 / 50 Which of the following physical concepts best explains why passengers in fast moving cars should always fasten their seat-belts? terminal velocity moment inertia centripetal force 18 / 50 The method of mixtures as a means of measuring the amount of heat of a substance depends of the principle of conservation of ______ energy angular momentum charge momentum 19 / 50 The mechanism of heat transfer from one point to another through vibration of the molecules of the medium is called ------------- radiation conduction diffusion convection 20 / 50 The main condition for the rigid body is that the distance between various particles of the body does not ____. Check 21 / 50 What is the unit of impulse? Check 22 / 50 How fast must a ball be rolled along the surface of a 70-cm high table so that when it rolls off the edge it will strike the floor at the same distance (70cm) from the point directly below the edge of the table? 215.3 cm/s 174.5 cm/s 185.2 cm/s 143.7 cm/s 23 / 50 Â A stone thrown from ground level returns to the same level 4 s after. With what speed was the stone thrown? Take $g = 10ms^{-2}$ 10 m/s 15 m/s 20 m/s 30 m/s 24 / 50 Â Which of the following contributes to the instability of an object? low centre of gravity broad base of the object low potential energy high centre of gravity 25 / 50 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 ________ pressure recoil velocity forward displacement forward acceleration 26 / 50 Forces are called coplanar when all of them acting on body lie in one _____. Check 27 / 50 One of these is an example of thermal radiation detector thermal glass thermal rod bolometer thermometer 28 / 50 Â 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 _______ zero at T greatest at T and Q greatest at P the same at P as at Q and T 29 / 50 The physical pendulum is any real pendulum in which all the mass is taken to be concentrated at a_____. Check 30 / 50 On what thermometric property does the working of a thermistor depend? change in presure at constant volume with change in temperature change in pressure with change in temperature change in electrical resistance with change in temperature change in volume at constant pressure with change in temperature 31 / 50 The _________ is an aggregate of point masses such as that the relative separation between any two points remains invariant Check 32 / 50 Â 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? 10 40 0 20 33 / 50 The coefficient of limiting static friction is the ratio of the ____ to the normal force. Check 34 / 50 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? Check 35 / 50 A wall or partition that allows free exchange of heat energy between two systems is referred to as -------------- isothermal isobaric upper fixed point and the Lower fixed point adiabatic 36 / 50 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 $g = 10ms^{-2}$ 30 m below the top of the building 30 m above the building 15 m below the top of the building 15 m above the top of the building 37 / 50 Â Which of the following is NOT true? boiling takes place only at the surface of the liquid takes place at a definite temperature and pressure evaporation occurs only at the surface of a liquid boiling of a liquid evaporation occurs at any temperature of a liquid 38 / 50 Â Which of the following statements is not correct about reference frames? If the coordinate axes of a reference frame attached to an object remain fixed in space then the object is at rest Laws of physics are invariant (retain the same form) in inertial reference frames In non-inertial reference frames the motion of objects depend only on the interactions of constituent particles among themselves Any reference frame moving at constant velocity with respect to an inerial reference frame is also inertial 39 / 50 Gases occupy volume of the __________. Check 40 / 50 Â 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 $vec{B}$ 18.4 16.2 14.8 12.6 41 / 50 3-vectors are only properly representedÂ in a 3-dimensional _____. Check 42 / 50 Â What are the dimensions of power (time rate of change of expending energy) $MLT^{-2}$ Â $M^{2}L^{2}T^{-3}$ $ML^2T^{-3}$ Â $ML^{2}T^{-2}$ Â 43 / 50 According to the kinetic-molecular theory, particles of matter are in motion in both gas and _____. Check 44 / 50 Â 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? 39.8 N 50.0 N 38.3 N 28.3 N 45 / 50 Which of the following substances has the highest viscosity at room temperature? kerosine Water alcohol palm oil 46 / 50 Â The speed of 90 hm/hr is equal to ------------------ m/s 150 324 90 25 47 / 50 The general motion of a rigid body is a combination of ________and rotation. Check 48 / 50 Â The trajectory of a projectile is ________ a parabola an ellipse a straight line a circle 49 / 50 Â The absolute zero temperature refers to the temperature at which _____ theoretically all thermal motions will cease pure ice melts at normal atmospheric pressure pure ice, water and water vapour at normal atmospheric pressure are in equilibrium pure ice becomes steam at atmospheric pressure 50 / 50 A Null vector is a vector whose magnitude is __________. Check Restart quiz Rate this quiz Send feedback