Which expression gives magnetic flux?
qVB sinθ
μϕI2πr
BA cos θ
-N dϕdt
Correct answer is C
the magnetic flux through a surface is the surface integral of the normal component of the magnetic field B over that surface.
It is usually denoted Φ or ΦB. The SI unit of magnetic flux is the weber
Mathematically it is represented as B = Φ/A
where B is magnetic flux density in teslas (T),
Φ is magnetic flux in webers (Wb), and
A is area in square meters (m2).
specific latent heat of fusion of ice
specific heat capacity of ice
heat capacity of ice
specific heat of vaporization of ice
Correct answer is A
Specific latent heat of fusion of a substance is the quantity of heat required to convert the unit mass of the substance from the solid to the liquid state without change in temperature.
6.0 N
5.0 N
12.0 N
36.0 N
Correct answer is D
A person would weigh six times less on the moon than they do on Earth.
OR
A person would weigh six times more on the earth than they do on moon.
16ofx = 6.0N on the moon
x = 6 * 6 = 36
The eclipse of the moon occurs when?
the moon reflects the rays from the sun to the earth
the moon comes exactly between the earth and the sun
the earth comes exactly between the moon and the sun
the sun comes exactly between the earth and the moon
Correct answer is C
Eclipse of the moon occurs when the earth comes between the sun and the moon.
In order to view the sun, the most suitable instrument to use is?
helioscope
telescope
stroboscope
sun meter
Correct answer is A
A helioscope is an instrument used for observing the sun and sunspots.
The helioscope was first used by Benedetto Castelli and refined by Galileo Galilei.