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