Question

SECTION -A ( Marks)
10
Q1. Select &Write the correct answer
Light year is a unit of
a) Time
b) Mass C) Distance d) Luminous Intensity
The magnitude of scalar product of two unit vectors perpendicular to each other it
a) 2/3
An object thrown from a moving bus is an example of
a) Uniform circular motion
c) Projectile motion
b) Rectilincar motion
d) Motion in one dimension
A mass 2kg moving with some speed is directly approaching another mass m moving
with double speed. After some time they collide with coefficient of restitution 0,5.
Ratio of their respective speeds after collision is
b) 3/2
C) 2
The binding energy of a satellite revolving around planet in a circular orbit is 3 x 10%
J. Its kinetic energy is
a) 6 x 10'
b)-3 x 10')
6x 101
d) 6x 10's
(vi)
The point on stress-strain curve at which strain begins to increase even without
increase in stress is called
a) Elastic point b) Yield point c) Breaking point d) Neck point
(vii) The walls of the hall built for music concerns should
a) Amplify sound b) Reflect sound c) Transmit sound d) Absorb sound
(viii) Two charges of LOC each are places Im apart in free space the force between them
will be
b) 9 x 10°N
c) 9x 10'N
d) ION
Which of the following is an ohmic conductor?
a) Transistor b) Vacuum tube c) Electrolyte d) Nichrome wire
Inside a bar magnet the magnetic field lines
a) are not present
b) are parallel to the cross sectional area of the magnet
c) are in the direction from N pole to s pole.
d) are in the direction from S pole to N pole.​

Answer 1

Answer:

Measurement is the numerical quantification of the attributes of an object or event, which can be used to compare with other objects or events. ... This system reduces all physical measurements to a mathematical combination of seven base units. The science of measurement is pursued in the field of metrology.