Units and Graphs  AP  9th Class Physical Science Bits 12th Lesson

Units and Graphs

AP  9th Class Physical Science Bits 12th Lesson

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
Answer:
B) after the magnitude

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

Question 3.
Units of temperature in SI system
A) °C
B) Kelvin
C) Calorie
D) A (or) B
Answer:
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
Answer:
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
Answer:
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
Answer:
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
Answer:
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
Answer:
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
Answer:
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
Answer:
B) 10^-3

Question 11.
To convert km/hr into m/s we should multiply m/s with
A) 518
B) 185
C) 95
D) 59
Answer:
A) 518

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
Answer:
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
Answer:
C) 2 kg

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

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

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

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

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

Question 24.
Area of a – t graph shows
A) Speed
B) Velocity
C) Position
D) Displacement
Answer:
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
Answer:
A) Straight line passing through the origin

Question 26.
F ∝ 1d2 .The graph of F – d is
A) straight line
B) parabolic
C) irregular
D) A or B
Answer:
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
Answer:
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
Answer:
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
Answer:
A) straight line passing through origin

Question 30.

Latent heat of fusion of ice shows
A) AB
B) BC
C) CD
D) DE
Answer:
B) BC