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Quiz 26
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Q.1
A body is initially moving with a velocity of 5 m/s. It undergoes an acceleration of 2 m/s
2
for 4 seconds. Find the displacement (in m) of this body in these 4 seconds.
4
72
36
8
Q.2
Formula for distance is
Speed x time
Time / speed
Speed x acceleration
Velocity / speed
Q.3
Acceleration is
Inversely proportional to force
Inversely proportional to mass
Directly proportional to mass
Directly proportional to force
Q.4
A tennis ball machine serves a ball vertically into the air from a height of 2 feet, with an initial speed of 110 feet per second. After how many seconds does the ball attain its maximum height?
2.87 sec
3.44 sec
4.65 sec
5.41 sec
Q.5
Scalar Quantities are
Physical quantities which have magnitude only and no direction
Physical quantities which have no magnitude only and only direction
Physical quantities which have magnitude only and direction
Physical quantities which have no magnitude and no direction
Q.6
If velocity is constant then acceleration is what?
Constant
Increasing
Zero
Infinite
Q.7
Which of the following pairs of physical quantities have the same dimensions?
Force and Power
Work and Power
Work and Energy
Momentum and Power
Q.8
For a body moving with uniform acceleration its final velocity equals ________
Average velocity - initial velocity
2 x average velocity - initial velocity
2 x average velocity + initial velocity
Average velocity + initial velocity
Q.9
A car accelerates uniformly from 18 kmph to 72 kmph in 5 s. The acceleration of the car (in m/s
2
) is:
3
5
6
7
Q.10
Which among the following is false about displacement?
It can be positive, negative or zero
Displacement is never greater than Distance
Its SI unit is meter
It is always positive
Q.11
The motion of the wheels of a bullock-cart while moving on the road is an example of
Oscillatory and rotatory motion
Oscillatory and translatory motion
Translatory and rotatory motion
Translatory motion only
Q.12
The motion of a freely falling body is an example of ________ motion.
Uniformly accelerated
Non-uniformly accelerated
Constant velocity
Constant speed
Q.13
Acceleration is the rate of change of
Speed
Velocity
Jerk
Jounce
Q.14
Rate at which velocity changes over time?
Speed
Displacement
Acceleration
Jerk
Q.15
Who is the first person to define speed
Galileo
Newton
Kepler
Ptolemy
Q.16
What is the fundamental unit of amount of a substance?
Mole
Candela
Kelvin
Meter
Q.17
The motion of a body that repeats itself after a regular interval of time is
A periodic motion
A simple harmonic motion
An aperiodic motion
An oscillatory motion
Q.18
A light year is a measure of :
Speed
Velocity
Distance
Time
Q.19
The time period of a seconds pendulum is
1 second
2 seconds
0.5 second
1.5 second
Q.20
Magnetic keepers are used to protect magnets from :
Earth's magnetic field
Effect of other magnets
Self-demagnetization
Demagnetization due to heating
Q.21
Which among the following is the fundamental quantity ?
Volume
Time
Velocity
Force
Q.22
In ________ motion of a body its velocity varies with time.
Uniform
Linear
Equilibrium
Non-uniform
Q.23
For an object, the state of rest is considered to be the state of ________ speed.
Increasing
Decrease
Inverse
Zero
Q.24
The unit of energy in MKS system is
Joule
Ohm
Erg
Volt
Q.25
One light year is equal to
2 trillion miles
6 trillion miles
8 trillion miles
9 trillion miles
Q.26
Gravitational force is maximum at which place
Poles
Tropic of cancer
Tropic of capricorn
Equator
Q.27
Negative acceleration is in the opposite direction of:
Force
Distance
Velocity
Momentum
Q.28
If an object moves with constant velocity,
It must have constant speed
It must have constant direction
It must have constant speed in constant direction
None of the above
Q.29
One billionth of a second is called
Microsecond
Picoseconds
Millisecond
Nanosecond
Q.30
Which one of the following is the value of one nanometer?
10
-7
cm
10
-6
cm
10
-4
cm
10
-3
cm
Q.31
A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance
Will increase
Will decrease
Does not change
Varies with the increase of depth of the immersion of the iron piece
Q.32
1 amu is equivalent to
1 eV
931 eV
931 KeV
931 MeV
Q.33
Parsec is the unit of
Distance
Time
Intensity of light
Magnetic line
Q.34
One nanometer is equal to ________ meters.
10 raised to the power (-3)
10 raised to the power (-6)
10 raised to the power (-9)
10 raised to the power (-12)
Q.35
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
Q.36
A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls
Behind him
In front of him
Into his hand
By his side
Q.37
What is the force of attraction between any two bodies by virtue of their masses is called?
Electromagnetic Force
Gravitational Force
Centripetal Force
Nuclear Force
Q.38
If a boy sitting in a train, which is moving at a constant velocity, throws a ball straight up into the air, the ball will
Fall in front of him
Fall behind him
Fall into his hand
None of the above
Q.39
If the length of a simple pendulum is halved then its period of oscillation is
Doubled
Halved
Increased by a factor 2
Decreased by a factor 2
Q.40
While catching a ball, a player pulls down his hands to lower the–
Force
Momentum
Impulse
Catching time
Q.41
Momentum is measured as the product of :
Mass and inertia
Mass and force
Mass and velocity
Mass and acceleration
Q.42
1 m/s equals ________ km/hr
5/16
16/5
18/5
5/18
Q.43
The Length of the Day is determined in
Length of the hours
Length of the year
Astronomical units
Solar terms
Q.44
A hydrogen balloon floats up because of
Air pressure decreases with decrease in height
Air pressure decreases with decrease in weight
Weight of the balloon is less than the weight of air displaced by it.
The pressure inside the balloon is more than the pressure outside it
Q.45
A boat will submerge when it displaces water equal to its own:
Volume
Weight
Surface area
Density
Q.46
When a steel ball is placed on the surface of mercury, it does not sink because
Of the surface tension of mercury
Mercury is a semisolid
Of the high viscosity of mercury
The density of mercury is greater than that of steel
Q.47
Clouds float in the atmosphere because of their
Low pressure
Low density
Low viscosity
Low temperature
Q.48
Rate of change of momentum is
Area
Pressure
Force
Velocity
Q.49
Which law is also called law of inertia ?
Newton first law
Newton second law
Newton third law
All of above
Q.50
When a bar magnet is cut into two equal halves, the pole strength of each piece –
Becomes double
Becomes half
Becomes zero
Remains the same
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