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WorksheetsRevise 1st term Physics
Total questions: 25
Worksheet time: 50mins
Name the type of motion in which speed remains constant but velocity is a variable. Also write the force required for such motion.
Circular motion, centrifugal force
Uniform circular motion, centripetal force
Uniform circular motion, centrifugal force
Uniform linear motion, Restoring force
A boy weighing 40kgf climbs up stairs of 30 steps each 20 cm high in 4 minutes and a girl weighing 30 kgf does the same in 3 minutes. Compare their (i) Work done
4:3
3:4
1:1
4:1
A boy weighing 40kgf climbs up stairs of 30 steps each 20 cm high in 4 minutes and a girl weighing 30 kgf does the same in 3 minutes. Compare their (i) Power developed
4:3
3:4
1:1
4:1
Will the position of centre of gravity change or not when the body is deformed
Yes
No
Yes or No depending on shape of body
write the S.I unit of moment of force.
Nm
dyne cm
Nm2
N/m
A type of single pulley is very often used as a machine even though it does not give any gain in mechanical advantage. Name the type of pulley used and state for what purpose such a pulley is used?
Single fixed pulley, change direction of effort downwards
Single movable pulley , force multiplier
Block and tackle, Force multiplier
combination of fixed and movable pulley
Which colour of visible white light is deviated in glass prism the most and why?
Red, more wavelength
violet, less wavelength
Red, less wavelength
violet, more wavelength
The speed of light in glass is 2 × 105 kms-1. Find the refractive index of glass.
3/2
2/3
1
4/3
Name one property of wave which does not change when a wave passes from one medium to another.
wavelength
frequency
velocity
all properties changes
Name one property of wave which changes when a wave passes from one medium to another. (More than one options might be correct)
wavelength
velocity
intensity
frequency
What will happen and why
Return back along same path, Principle of reversibility
will be refracted more, Snells law
Nothing will happen
depends on colour of light used
Ranbir claims to have obtained an image twice the size of the object using a concave lens. Is he correct?
Yes
No
Write the value of ideal mechanical advantage of (i) Single fixed pulley
1
2
3
4
Write the value of ideal mechanical advantage of Single movable pulley
1
2
3
4
Write the value of ideal mechanical advantage of block and tackle system with 2 pulleys in each block
1
2
3
4
Which term remain constant for a particular machine design
M.A
V.R
Efficiency
None
What is value of M.A for a force multiplier
>1
=1
<1
=0.5
Which wave is used for sterilizing surgical instruments
infrared
ultraviolet
radio wave
gamma waves
X rays
Which wave is used for therapeutic purposes
infrared
ultraviolet
radio wave
gamma waves
X rays
Which wave is used for detecting bone fractures
infrared
ultraviolet
radio wave
gamma waves
X rays
Which wave is used for killing cancer cells
infrared
ultraviolet
radio wave
gamma waves
X rays
Which wave is used for satellite transmission
infrared
ultraviolet
radio wave
gamma waves
X rays
Name the physical quantity measured in kWh.
energy
power
electricity
light
1 kWh= how it is related to the S.I unit of this quantity.
3.6J
3.6 X 103 J
3.6 X 106J
4.2 J
What is the value of critical angle for a glass air interface
24
49
45
42
