Answer : The electric current of a circuit is, 2.8 A.
Explanation :
Using Ohm's law :
Or,
where,
R = resistance of a circuit = 28 Ω
V = voltage of circuit = 76 volts = 76 V
I = current flowing in a circuit = ?
Now put all the given values in the above formula, we get :
Therefore, the electric current of a circuit is, 2.8 A
A
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I tried dude, but someone got rid of my helpful resource...<span />
Answer:
a) their amplitudes are the same their phase difference is constant their frequencies are the same
Explanation:
Coherent waves are the waves that have constant phase difference, equal frequency, amplitude and waveform.
Frequency denotes the number of cycles a wave completes in one second.
Amplitude is the maximum height that the wave reaches.
Waveform is the two dimensional representation of a wave in graphical form.
The total power emitted by an object via radiation is:
where:
A is the surface of the object (in our problem,
is the emissivity of the object (in our problem,
)
is the Stefan-Boltzmann constant
T is the absolute temperature of the object, which in our case is
Substituting these values, we find the power emitted by radiation:
So, the correct answer is D.
