Practice the AP 9th Class Physical Science Bits with Answers Chapter 12 Units and Graphs on a regular basis so that you can attempt exams with utmost confidence.

## AP State Syllabus 9th Class Physical Science Bits 12th Lesson Units and Graphs with Answers

Question 1.
Units of a physical quantity should be placed
A) before the magnitude
B) after the magnitude
C) above the magnitude
D) below the magnitude
B) after the magnitude

Question 2.
Which of the following is not a fundamental quantity ?
A) light intensity
B) length
C) pressure
D) mass
C) pressure

Question 3.
Units of temperature in SI system
A) °C
B) Kelvin
C) Calorie
D) A (or) B
B) Kelvin

Question 4.
SI system means
A) Standard International Measures
B) State Implement Units
C) International System of Units
D) International Standards of Measurements
C) International System of Units

Question 5.
Seconds are the units belongs to
A) CGS system
B) MKS system
C) SI system
D) Above all
D) Above all

Question 6.
Match the following.
a) Electricity i) mol
b) Light intensity ii) candela
c) Quantity of substance iii) ampere
A) a – iii, b – ii, c – i
B) a – i, b – ii, c – iii
C) a – i, b – iii, c – ii
D) a – ii, b – iii, c – i
A) a – iii, b – ii, c – i

Question 7.
In the derivation of units of pressure which of the following base units are used ?
a) meter
b) kilogram
c) second
A) a & c
B) b & c
C) a & b
D) a, b & c
D) a, b & c

Question 8.
1 pico meter =
A) 10-9 meters
B) 10-8 meters
C) 10-12 meters
D) 10-10 meters
C) 10-12 meters

Question 9.
Which of the following is incorrect ?
A) 10-9 m = 1 nanometer
B) 10-6 m = 1 micrometer
C) 10-3 m = 1 kilometer
D) None of the above
C) 10-3 m = 1 kilometer

Question 10.
5 × 10-3 km – 0.005 km
In the above data conversion factor is
A) 5
B) 10-3
C) 0.005
D) 5 × 10-3
B) 10-3

Question 11.
To convert km/hr into m/s we should multiply m/s with
A) $$\frac{5}{18}$$
B) $$\frac{18}{5}$$
C) $$\frac{9}{5}$$
D) $$\frac{5}{9}$$
A) $$\frac{5}{18}$$

Question 12.
Velocity = 10 cm/s. Velocity in SI system is
A) 0.1 m/s
B) 0.01 m/s
C) 1 m/s
D) 103 m/s
A) 0.1 m/s

Question 13.
Which of the following is correct presentation of units ?
A) 2 Kg
B) 2kg
C) 2 kg
D) 2 kgs
C) 2 kg

Question 14.
Which of the following is not correct?
A) 4 joules
B) 4 j
C) 4 J
D) None
B) 4 j

Question 15.
Which of the following is correct ?
A) MW
B) kW
C) Watts
D) K.W
A) MW

Question 16.
Pramila calculated oscillations of a pendulum by fixing length of thread at 1 m, 2 m, 3 m, ………………
From the data independent variable is
A) no. of oscillations
B) length
C) time
D) mass of bob
B) length

Question 17.
The range of 1, 1.1, 0.5, 1.6, 1.01, 1.5 is
A) 1.1
B) 0.5
C) 1.01
D) 0.1
A) 1.1

Question 18.
If the range is 12 and no. of grids on x – axis is 24, then the scale on x – axis is
A) 2
B) 6
C) 0.5
D) 1
C) 0.5

Question 19.
Vertical axis and horizontal axis are
A) x – axis, y – axis
B) y – axis, x – axis
C) x – axis, x – axis
D) y – axis, y – axis
B) y – axis, x – axis

Question 20.
The graph of velocity and time of a free fall body is
A) curved line graph
B) straight line graph
C) A or B
D) Bar graph
B) straight line graph

Question 21.
Slope of s – t graph shows
A) Speed
B) Velocity
C) Acceleration
D) Position
B) Velocity

Question 22.
Slope of v – t graph shows
A) Speed
B) Velocity
C) Acceleration
D) Displacement
C) Acceleration

Question 23.
Area of v – t graph shows
A) Speed
B) Velocity
C) Acceleration
D) Displacement
D) Displacement

Question 24.
Area of a – t graph shows
A) Speed
B) Velocity
C) Position
D) Displacement
B) Velocity

Question 25.
The graph of elongation of a spring and mass attached to spring is in the shape of
A) Straight line passing through the origin
B) Straight line parallel to the x – axis
C) Straight line parallel to the y – axis
D) Curved line
A) Straight line passing through the origin

Question 26.
F ∝ $$\frac{1}{\mathbf{d}^{2}}$$ .The graph of F – d is
A) straight line
B) parabolic
C) irregular
D) A or B
B) parabolic

Question 27.
a) y is inversely proportion to x.
b) y is proportional to the square of x.
c) y is proportional to the square root of x.

Match the graphs.
A) a – i, b – ii, c – iii
B) a – ii, b – iii, c – i
C) a – iii, b – i, c – ii
D) a – iii, b – ii, c – i
A) a – i, b – ii, c – iii

Question 28.
Area of the graph of force and time is
A) pressure
B) displacement
C) impulse
D) none
C) impulse

Question 29.
Graph of Hooke’s law is in the shape of
A) straight line passing through origin
B) straight line parallel to the x – axis
C) straight line parallel to the y – axis
D) curved line