Which of the following is a property of steel?
it cannot retain its magnetism longer than iron
it can be used for making temporary magnets
it can be used for making permanent magnets
it can easily be magnetized and demagnetized
Correct answer is C
Steel is not easily magnetized and dismagnetized
The eclipse of the sun occurs when the
moon is between the sun and the earth
earth is between the sun and the moon
moon is not completely hidden in the earth's shadow
moon's umbra falls on some part of the earth
Correct answer is A
Eclipse of the sun occurs when the moon which is opaque objects between the sun and the earth
0.06 D
0.02 D
0.03 D
0.04 D
no option is correct
Correct answer is B
No explanation has been provided for this answer.
0.3
6.0
3.0
2.0
Correct answer is C
Dielectric constant = (c)/c° = (60)/20 = 3
When a red rose flower is observed in blue light, what colour does the observer see?
Red
Blue
Magenta
yellow
No correct option
Correct answer is E
The colour which an object presents to the eye is the colour of light it reflects. Red rose flower will therefore absorb any other colour and reflect red. Therefore when viewed in blue light, it has no colur to reflect and will therefore appear black. Although mixture of red light and blue light = magenta .