WorksheetsNeutrino - Physics Event
Total questions: 20
Worksheet time: 20mins
When we try to close a water tap with our fingers, fast jets of water rushes through the openings between our fingers, why?
The area of cross-section of the outlet of water jet is reduced considerably
Due to the pressure applied by our fingers.
Due to surface tension
Due to the heat produced by our fingers
Frequencies in the UHF (Ultra High Frequency) range normally propagate by means of:
Ground Waves
Sky Waves
Surface Waves
Space Waves
Hydraulic machines work on the principle of:
Newton’s Law
Joule’s Law
Pascal’s Law
Flotation Law
A drawing of the lines of force of a magnetic field provides information on
direction of field only
magnitude of field only
both the direction and magnitude of the field
the force of the field
When detergent is added to water, the surface tension will:
Increase
Decrease
No Change
Become Zero
Which among the following waves can’t be polarized:
Sound
Radio
Infrared
Ultraviolet
Ultrasound is used to detect ________ in metal blocks:
Metal heat
Cracks and Flaws
Metal Opacity
Metal Heaviness
A light ray does not bend at the boundary while passing from one medium to the other medium if the angle of incidence is :
0 degree
45 degree
60 degree
90 degree
The word physics is derived from the Greek word ‘FUSIS’ which means :
Nature
Force
Energy
Physical Philosophy
A body is acted upon by two unequal force in opposite directions , but not on the same line , the effect arising will be :
The body will only have rotational motion
The body will only have translational motion
The body will have either rotational or translational motion
The body will have both rotational as well as translational motion
A comet orbits the Sun in a highly elliptical orbit. Does the comet have a constant.( Neglect any mass loss of the comet when it comes very close to the Sun.)(MSQ)
Angular Speed
Angular Momentum
Kinetic Energy
Total energy throughout its orbit
Which of the following examples represents periodic motion? (MSQ)
A swimmer completing one (return) trip from one bank of a river to the other and back.
A freely suspended bar magnet displaced from its N-S direction and released.
A hydrogen molecule rotating about its centre
of mass.
An arrow released from a bow.
In which of the following examples of motion, can the body be considered approximately a point object:(MSQ)
A railway carriage moving without jerks between two stations.
A cap on top of a man cycling smoothly on a circular track.
A spinning cricket ball that turns sharply on hitting the ground.
A tumbling beaker that has slipped off the edge of a table.
Identify examples of projectile motion from among the following situations:
(MSQ)
An archer shoots an arrow at a target
Rocks that are ejected from an exploding volcano
A bomb is released from a bomber plane.
A boat sails in a river.
State which of the following statements are false. (MSQ)
In an elastic collision of two bodies, the momentum and energy of each body is not conserved.
The total energy of a system is always conserved, no matter what internal and external forces on the body are present.
Work done in the motion of a body over a closed loop is zero for every force in nature.
In an inelastic collision, the final kinetic energy is always less than the initial kinetic energy of the system.
Suppose the earth shrunk suddenly to one-fourth its radius without any change in its mass. What would be the escape velocity then?
[Hint: ve=r2GM ]
Becomes Double
Remains the same
Reduces
Becomes Zero
Calculate the wavelength associated with the electrons moving with a velocity v=1×108ms−1 . Take mass of electron =9.1×10−31 kg and h=6.6×10−34J.s [Hint λ=mvh ]
7.25×10−12 m
7.65×1010 m
8.25×10−10 m
7.36×10−9 m
In our homes, the electricity is supplied at 220V. Calculate the resistance of the bulb if the current drawn by it is 0.2A
1100Ω
1200Ω
44Ω
176Ω
A person lifts 5kg potatoes from the ground floor to a height of 4m to bring it to first floor. Calculate the work done.
196J
175J
360J
240J
The refracting angle of a prism is 0.5° and its refractive index is 1.6. Calculate the deviation caused by the prism.
[Hint δ =(μ−1)∠A ]
0.3°
6.4°
0.5°
1.6°
