Physics
A rear-view mirror for driving is
Plain
Concave
Convex
Inverted
Convex
Type of mirror used in the rear-view mirror must be convex mirrors, because it creates smaller, yet still upright images. Concave mirrors would create an inverted image and the cars you see are not upside down.
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Radian is used to measureA. Temperature
B. Intensity of Flame
C. Angle
D. Solid Angle
Flemings ”Left hand Rule” is associated with the effect of
A. Electric field on current
B. Magnetic field on magnet
C. Electric field on magnet
D. Magnetic Field on current
The sky appears blue due to
A. Rayleigh scattering
B. Mie scattering
C. Back scattering
D. None of the above
Vehicles use ________ to see the objects coming from behind.
A. Concave lens
B. Convex lens
C. Convex mirror
D. Concave mirror
Which elements are malleable and good conductors of electricity?
A. Tin and silver
B. Iodine and silver
C. Tin and xenon
D. Iodine and xenon
The colour of the ocean appears to be blue because the sunlight falling on it is
A. Reflected
B. Refracted
C. Diffracted
D. Scattered
Mach number is used in connection with the speed of
A. sound
B. aircraft
C. spacecraft
D. ships
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