Q:
The working principle of a washing machine is
A) reverse osmosis
B) diffusion
C) centrifugation
D) dialysis
Q:
Nuclear sizes are expressed in a unit named
A) Fermi
B) Angstrom
C) Newton
D) Tesla
Q:
The speed of light will be minimum while passing through
A) water
B) vaccum
C) air
D) glass
Q:
Which of the following is not a vector quantity?
A) speed
B) velocity
C) torque
D) displacement
Q:
The most suitable unit for expressing nuclear radius is
A) micro
B) nanometre
C) fermi
D) angstrom
Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?
A) 25 W
B) Both
C) 100 W
D) Neither
Q:
An air bubble in water will act like a
A) convex lens
B) convex mirror
C) concave lens
D) concave mirror
Q:
Which of the following is not the unit of time
A) Parallactic second
B) Micro Second
C) Leap year
D) Solar day
Answer these all the questions
Answers
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the working principle of washing machine is centrifugation
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Answer:
(c) centrifugation
Explanation:
The working principle of washing machine is centrifugation. it is a separation process which uses the action of centrifugal force to promote accelerated setting of particles in a solid- liquid mixture . The washing machine consist of centrifuge for this purpose
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