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Work and Energy
100
Dynamics
87
Kinematics
98
Transfer of Heat
51
Turning Effect of Forces
62
Gravitation
46
Matter Properties
94
Thermal Properties of Matter
103
Atomic and Nuclear Physics
101
Basic Electronics
101
Current Electricity
187
Electromagnetism
101
Electrostatics
123
Geometrical Optics
204
Information and Communication Technology
100
Simple Harmonic Motion and Waves
96
Sound
108
Show/Hide Answers
Physics
What does the slope of a velocity time graph represent?
Acceleration
Distance
Speed
Momentum
The slope of a velocity graph represents the acceleration of the object. So, the value of the slope at a particular time represents the acceleration of the object at that instant.
Author:
rikazzz
Comment
Everyday Science
The SI unit of power is
joules
newton
watt
omega
Author:
rikazzz
Comment
Electrostatics
By using electroscope, if the body is negatively charged then due to electrostatic induction, then on the disk there will be appear
both positive and negative charges
negative charge
positive charge
no charge
Author:
rikazzz
Comment
Sound
Sound energy passing per second through a unit area held perpendicular to the direction of propagation of sound waves is called
loudness of sound
pitch of sound
quality of sound
intensity of sound
Author:
rikazzz
Comment
Turning Effect of Forces
A simple method to find the center of gravity of a body is the usage of
stop watch
plumb line
pendulum
screw gauge
Author:
rikazzz
Comment
Physics
The electric current in a metal wire is due to the flow of –
Electrons
Protons
Ions
Holes
The electric current in a metal wire is due to the flow of electrons.
Author:
rikazzz
Comment
Kinematics
In terms of velocity, the symbol v
f
 is used for
final velocity
initial velocity
negative velocity
total velocity
Author:
rikazzz
Comment
Dynamics
The acceleration produced by a force of 120 N in a mass of 35 kg will be
4 ms
−2
3.43 ms
−2
5.21 ms
−2
6.8 ms
−2
Author:
rikazzz
Comment
Physics
Rainbows are produced when sunlight :
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.
None of the given statements is correct.
Rainbows are produced when sunlight incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
Author:
rikazzz
Comment
Physics
Fiber optics cable used in communication, works on the principle of
Regular reflection of light
Diffuse reflection of light
Refraction of light
Total internal reflection of light
Optical communication utilizes the principle of total reflection. When the injection angle of light satisfies certain conditions, light can form total reflection in the optical fiber, thereby achieving the purpose of long-distance transmission.
Author:
rikazzz
Comment
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