FBQ1: Systematic error can be eliminated to an ___. Answer: *extent* FBQ2: In an experiment to determine the acceleration due to gravity of a simple pendulum, the measurements needed from the instrument are length of the thread and ____of oscillation of the pendulum bob Answer: *time* FBQ3: The S.I unit of acceleration due to gravity, g is __. Answer: ms-²* FBQ4: The error due to wear and tear of a particular instrument is called____. Answer: *Back lash error* FBQ5: Error not due to instrumental problem is _____. Answer: *Observational error* FBQ6: _____causes like parallax in reading a voltmeter scale. Answer: *Faulty observation* FBQ7: A plotted graph showing a straight line through the origin indicates thatthe two plotted variables are ____ to each other  Answer: *directly proportional* FBQ8: To record the observations during an experiment the measured values would be recorded to at least __ decimal places Answer: *two* FBQ9: If y is plotted on the vertical axis and x on the horizontal axis in equation y = mx, the slope is m which is the ____ value. Answer: *constant* FBQ10: ____are due to causes which can be identified. Answer: *Systematic error* FBQ11: In the equation y = mx + b, m and b are ____. Answer: *constants* FBQ12: When independent measurements are multiplied or divided the___ in error in the result is the square root of the sum of squares of fractional errors in individual quantities. Answer: *fractional error* FBQ13: The following values 32, 30, 28, 26 have two significant digits except _____. Answer: *30* FBQ14: In recording the observations in an experiment, the calculated values like reciprocal, square, sine of values would be recorded to at least __ decimal places Answer: *three* FBQ15: The error in the result is found by determining how much change occurs in the result when the maximum error occurs in the _____. Answer: *Data* FBQ16: Data collected can be used to show____ between two physical quantities through graphs. Answer: *relationship* FBQ17: Which type of motion is executed by a simple pendulum bob? Answer: *simple harmonic motion* FBQ18: ____is defined as when an object moves to and fro in such a way that its acceleration is directly proportional to its displacement and is always directed to its equilibrium position. Answer: *simple harmonic motion* FBQ19: Materials that can regain their original shape after the deformation (change in dimensions) are called____. Answer: *Elastic materials* FBQ20: An ___is said to perform simple harmonic motion if it moves to and fro in such a way that its acceleration is directly proportional to its displacement and is always directed to its equilibrium position Answer: *object* FBQ21: A measurement possessing greater number of significant digits has ______ accuracy Answer: *Greater* FBQ22: At _____ position of Simple Harmonic Motion (SHM) the displacement of the body is zero. Answer: *Equilibrium* FBQ23: What is the unit of the specific latent heat of fusion of ice? Answer: *Jkg-1* FBQ24: If a simple pendulum of mass was displaced such that the bob made 20 oscillations in 45.70 seconds. Calculate the period T of oscillation in second. Answer: *2.29* FBQ25: The period of oscillation is the time taken for the body to make ___complete oscillation Answer: *one* FBQ26: When a mass is hung on a spring stretches 6 cm, its period of vibration if it is then pulled down a little is _____. Answer: *0.5s* FBQ27: A mass (m) is hung at the end of a spiral spring of force constant of 200N/m. If the spring oscillates with a period of 0.45 s when set in motion, the value of its mass is ____. Answer: *1kg* FBQ28: ____can be defined as the ratio of the mass of water to the mass of an equal volume of water. Answer: *Relative density* FBQ29: Relative density bottle is also called ______ gravity bottle. Answer: *specific* FBQ30: If two values have equal unit of measurement, they are therefore said to be ___ Equally_____. Answer: *precise* FBQ31: Glass is an example of ____ material Answer: *Brittle* FBQ32: The relationship between any two physical quantities can be determined through the use of ___. Answer: *graph* FBQ33: Whose law is this ‘the force on an elastic material is directly proportional to the extension produced provided that the elastic limit is not exceeded’ Answer: *Hooke* FBQ34: If the graph of force F is plotted against the extension e, we shall obtain a ___ graph showing that Hooke's law is obeyed. Answer: *linear* FBQ35: A mass of 40kg hung on an elastic spring of length 37.2cm extends to 42.0cm. The force constant of the spring take g as 10ms¯² is ____. Answer: *83.33 Nm¯¹* Multiple Choice Questions (MCQs): MCQ1: Which of the following measurement done with meter rule is more precise? Answer: 17.9 cm MCQ2: Relative error is ___ Answer: the difference between possible error and the total measurement MCQ3: The two types of variables that can be measured are ____. Answer: X and Y variables MCQ4: If two values have equal unit of measurement, they are therefore said to be ____ Answer: equally precise MCQ5: The value of acceleration due to gravity depends on one of these: Answer: velocity MCQ6: The period of the body performing simple harmonic motion is 2s. If the amplitude of the motion is 3.5 cm, calculate the maximum speed (π=22/7). Answer: 20.4 cm/s MCQ7: Which of the following is the best equation of a non-linear graph? Answer: y=ax+bx MCQ8:  If the graph produced is a straight line, then the relationship is described as____ Answer: Linear MCQ9: Graphs showing how two physical measurements are related can be represented in which form? Answer: Variable MCQ10: If y=mx + b, and y is plotted against x; what type of graph will be obtained? Answer: horizontal graph MCQ11: Relative error can be defined as____ Answer: product of the possible error to the total measurement MCQ12: A measurement possessing greater number of significant digits has ___ Answer: less relative accuracy MCQ13: The time taken for a given event is 7.4s and the possible error is 0.05cm, what is the relative error? Answer: 0.003 MCQ14: Consider the following pair of measurements 40.0cm or 8.0cm. Which one is more accurate? Answer: 8.0cm MCQ15: the following physical quantities are fundament quantities except Answer: Density MCQ16: Which of the following is correct about types of graph? Answer: linear graph MCQ17: Multiplication and division rule states that the product or quotient of two measurements should be rounded off ___ Answer: to contain less significant digits as the measurement having fewer numbers of significant digits MCQ18: In measurement report, the non-zero digits are___ Answer: not significance MCQ19: If x is equal to 1 in the equation y = mx, what will be the value of y? Answer: y = 0 MCQ20: consider the equation T= 2π√(l/g) if T is plotted against π,the graph obtains will be______  Answer: linear graph MCQ21: Which of these statements about measurement is correct? Answer: All measurements are not exact MCQ22: Multiply the following figures: 5.2865, 3.8 and 19.62 and round off the result to more accurate value Answer: 394.14 MCQ23: Divide 9.5362 by 3.2 round off the result to more accurate value Answer: 3.21 MCQ24: Scientific measurements are expressed by using ____ Answer: rules MCQ25: The major errors in measuring instrument are Answer: zero error MCQ26: Human errors are based on; Answer: judgement and precision MCQ27: The possible error in measurement is due to Answer: imprecision in measuring devices MCQ28: Precision is a function of _______ Answer: relative error only MCQ29: The temperature of two places are recorded to be 30.56C and 32.22C we can say that they are___ Answer: equally precise MCQ30: A digit is significant if and only if ___ Answer: it affects the possible error MCQ31: Which of the following pair of quantities have identical S I unit?I . Force and surface tensionII. Surface tension and spring constant III. Torque and spring constant IV. Young’s modulus and pressure Answer: II only MCQ32: The inverse of the slope of graph of extension against tension in the spring represents _____. Answer: reciprocal of the spring constant MCQ33: If m and b are constants in the graph of y = mx + b. The value of the constant b represents ___. Answer: intercept on the graph MCQ34: The following are sources of error in a measuring instrument except ___ Answer: they arise due to changes in environment MCQ35: One of the following is not a systematic error. Answer: errors in judgement of an observer