32 Questions
How can a nail be demagnetized?
By removing the nail from the coil
What is the purpose of the slit ring commutator in the coil?
To change the direction of the current as the coil passes the vertical position
What type of mirror is commonly used in vehicles as a side view mirror?
Convex mirror
Why is the word 'ambulance' spelled left-right reversal in front of the ambulance vehicles?
So that when viewed in the driver's rear view mirror, it appears in the correct orientation
What type of image can be projected onto a screen?
Real image
What is the mirror formula?
$1/f = 1/do + 1/di$
Where would there be no image formed if an object is placed at point f of a concave mirror?
At the focus point
What type of image forms in a convex lens used in a camera?
Real, magnified, and inverted
What type of image forms in a convex lens used in a magnifying glass?
Virtual, upright, and magnified
What is the relationship between the angle of incidence and the angle of reflection?
They are always equal
In which type of lens is the center thicker than the edge?
Converging (convex) lens
What happens to the speed and wavelength of light as it passes from air into glass?
Speed decreases, wavelength decreases
Which of the following are possible effects of gamma radiation?
All of the above
What is the use of ultraviolet rays in plants?
Helps in making their own food
Where can microwaves be used?
Cellphone, oven, radio, satellites
Which technology uses gamma rays to improve food safety and extend the life of foods?
Food irradiation using gamma ray
What is the purpose of the slit ring commutator in the coil?
To change the direction of the current in the coil
What type of image forms in a convex lens used in a magnifying glass?
Inverted and smaller
Where is the word 'ambulance' spelled left-right reversal?
In front of the ambulance vehicles
In which type of lens is the center thicker than the edge?
Concave lens
What type of mirror is commonly used in vehicles as a side view mirror?
Convex mirror
What type of image forms in a plane mirror?
Upright and same size
What type of image is formed by a concave mirror when an object is placed at point F?
No image is formed
What type of image is formed by a convex lens used in a camera?
Real, magnified, and inverted
What type of image is formed by a convex lens used in a magnifying glass?
Virtual, upright, and magnified
What is the relationship between the angle of incidence and the angle of reflection?
They are always equal
Which type of lens is thicker in the center than the edge?
Converging lens (convex lens)
What happens to the speed and wavelength of light as it passes from air into glass?
Speed decreases, wavelength decreases
Which of the following are possible effects of gamma radiation?
Acute effects like hair loss and mutations
What is the ultraviolet ray useful for in plants?
Enhancing photosynthesis
Where can microwaves be used?
All of the above
What can infrared be used for?
Both a and b
Test your knowledge of electromagnetism and mirrors with this quiz. The questions cover topics such as magnetizing and demagnetizing nails, the use of slit ring commutator, properties of materials suitable for electromagnets, and the characteristics of convex mirrors.
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