A coin is made of ______
1 answer:
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Answer: R=40 Ω
Explanation:
R=1000/ (25)=40
Answer:
Number of turns in secondary will be 7
Explanation:
We have given primary voltage
Number of turns in the primary is
Secondary voltage is given
We have to find the number of turns in secondary
We know that
So
As the number of turns can not be in decimal so number of turns will be 7
Answer:
D) directly, inversely
Explanation:
The energy of a photon of light is directly proportional to its frequency and inversely proportional to its wavelength.
Frequency is the number of waves that passes through a point per unit of time.
Wavelength is the is the distance between successive crests or troughs on a wave.
Mathematically, frequency is related to wavelength and velocity using;
Energy = h x f
where h is the Planck's constant
f is the frequency
Since c = f ∧
where f is the frequency of the wave
∧ is the wavelength of the wave
c is the speed of light
So;
f = c/∧
Therefore;
E =
From the equation, we see an inverse relationship between E and wavelength and a direct one with frequency.