Answer:
1.59 Tesla per second
Explanation:
Given that
Radius of the conductor loop, r = 1 m,
Maximum induced emf to the loop, e = 5 V,
We take an assumption, we assume that the rate which the magnetic field is changing is dB / dt.
We then go ahead to apply Farady's law of electromagnetic induction
e = rate of change of magnetic flux
e = dФ /dt
e = A * dB / dt, on substituting we see that
A = πr²
A = π * 1²
A = π, plug in the value for A
5 = 3.14 * dB / dt
dB / dt = 5/3.142
dB / dt = 1.59 Tesla per second
The Young’s modulus of polythene is 0.8
Answer:
c. 0.25km
Explanation:
v=f x wavelength
3000 = 12 x wavelength
wavelength = 3000/12 = 250m
250m to km
To convert m to km, we divide by 1000
250/1000 =0.25km
wavelength = 0.25km
THE DOPPLER EFFECT. Anyways, it would have a higher whistle as it approaches you, when it gets to you it only gets quieter because it leaves after. Think of a motorcycle going by, its loud coming to you then as it passes it gets quieter.
Answer:
The two metals expand differently.
Explanation:
The bimetallic strip has two metal strips positioned like a bridge, these strips connect the electrical circuit to the heating system. When these strips are linear or "down" they allow the electricity to move through the circuit to the heating system to turn the heat on. When the strips are "up" the disconnect the electricity flow, thus turning the heating system off, thus the room becomes cool/cold.
