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Physics
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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
Work and Energy
If some energy given to a system, then energy in the required form obtained is always
less than the given energy
equal to the given energy
greater than the given energy
none of above
Author:
rikazzz
Comment
Geometrical Optics
The relation between the object and image distance from the lens in terms of the focal length of the lens is called
fiber optics
lens formula
ohm’s law
optical law
Author:
rikazzz
Comment
Electromagnetism
A step-up transform has a turns ratio of 1: 200. An alternating supply of 15 V is connected across the primary coil. The secondary voltage should be
3000 volts
1500 volts
1000 volts
2000 volts
Author:
rikazzz
Comment
Gravitation
In the gravitational field of the Earth, the gravitational force per unit mass is called the Earth’s
gravitational field weakness
gravitational field strength
zero gravitational field
altitude
Author:
rikazzz
Comment
Everyday Science
In SI units, the unit of temperature is
kelvin(K)
omega(ω)
pi(Ï€)
newton(N)
Author:
rikazzz
Comment
Physics
A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that
The rubber ball suffers greater change in momentum
The metal ball suffers greater change in momentum
Both suffer the same change in momentum
The initial momentum of the rubber ball is greater than that of the metal ball
As per the question, the rubber ball rebounds while the metal ball does not. So if m and v be the mass and velocity respectively, the change in momentum of rubber ball = 2 mv (in magnitude). However, the change in momentum of the metal ball = mv. The rubber ball suffers almost twice the change in momentum as experienced by the metal ball.
Author:
rikazzz
Comment
Simple Harmonic Motion and Waves
The kinetic energy of mass attached to spring at extreme position is
minimum
Maximum
moderate
zero
Author:
rikazzz
Comment
Information and Communication Technology
In radio, the coils are connected to
inductors
resistor
fixed capacitor
variable capacitor
Author:
rikazzz
Comment
Physics
The Length of the Day is determined in
Length of the hours
Length of the year
Astronomical units
Solar terms
The length of the day is determined in astronomical units.
Author:
rikazzz
Comment
Dynamics
Cream separator acts on the same principle of
centrifuge machine
pendulum
floatation
screw gauge
Author:
rikazzz
Comment
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