Answer:
Φ = 5.589×10⁻⁵ Wb
Explanation:
The inductance of a coil is given as
L = e/(di/dt) ..................... Equation 1
Where L = inductance of the coil, e = induced e.m.f, di/dt = rate of change of current in the coil.
Also,
The inductance of each turn of the coil when a magnetic field is step up in the coil is
L = NΦ/i ................. Equation 2
Where N = number of turns, Φ = magnetic field, i = current.
equating equation 1 and equation 2
e/(di/dt) = NΦ/i
making Φ the subject of the equation,
Φ = (e×i)/N.(di/dt) .................. Equation 3
Given: e = 28.0 mV = 0.028 V, N = 501 turns, di/dt = 12.0 A/s, i = 4.00 a
Substitute into equation 3,
Φ = (0.028×4)/(12×501)
Φ = 0.112/2004
Φ = 5.589×10⁻⁵ Weber
Φ = 5.589×10⁻⁵ Wb
The correct answer is the last one:
A and C are different elements, while D is an isotope of C.
In fact, A and C are different elements, because they have a different number of protons in the nucleus (A has 3 protons, while C has 4 protons). Instead, D and C are the same element (they both have 4 protons in the nucleus), but they are different isotopes since they have a different number of neutrons (D has 4 neutrons while C has 3 neutrons)
Answer:
a) A = 3 cm, b) T = 0.4 s, f = 2.5 Hz,
2) A standing wave the displacement of the wave is canceled and only one oscillation remains
Explanation:
a) in an oscillatory movement the amplitude is the highest value of the signal in this case
A = 3 cm
b) the period of oscillation is the time it takes for the wave to repeat itself in this case
T = 0.4 s
the period is the inverse of the frequency
f = 1 /T
f = 1 /, 0.4
f = 2.5 Hz
2) a traveling wave is a wave for which as time increases the displacement increases, in the case of a transverse wave the oscillation is perpendicular to the displacement and in the case of a longitudinal wave the oscillation is in the same direction of the displacement.
A standing wave occurs when a traveling wave bounces off some object and there are two waves, one that travels in one direction and the other that travels in the opposite direction. In this case, the displacement of the wave is canceled and only one oscillation remains.
Answer:
Upthrust = 20 N
Explanation:
The question says that "A body weighs 100N in air and 80N when submerged in water. Calculate the upthrust acting on the body
?"
Upthrust is defined as the force when a body is submerged in liquid, then liquid applies a force on it.
ATQ,
Weight of body in air is 100 N
Weight of body in water is 80 N
Upthrust is equal to the weight of body in air minus weight of body in water.
Upthrust = 100 N - 80 N
Upthrust = 20 N
So, 20 N of upthrust is acting on the body.
