Answer:
2.62 A
Explanation:
B = 2 T, Diameter = 2.5 cm , radius, r = 0.0125 m, t = 0.45 s, r = 0.01 ohm
Induced emf, e = rate of change of magnetic flux
e = A x dB / dt = 3.14 x (0.0125)^2 x 2 / 0.45
e = 0.026 V
induced current, i = e / R = 0.026 / 0.01 = 2.62 A
Here is the answer of the given question above. "The total angular momentum of an object changes when a net external force acts on the system." This statement is <span>"sometimes true. it depends on the forces point of application". The answer is option D.
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<h2>
Answer:</h2><h3>
<em><u>Alexander Graham Bell</u></em></h3><h2>
Explanation:</h2>
Alexander Graham Bell is often credited as the inventor of the telephone since he was awarded the first successful patent.
Answer:
Explanation:
Given
Lowest four resonance frequencies are given with magnitude
50,100,150 and 200 Hz
The frequency of vibrating string is given by

where n=1,2,3 or ...n
L=Length of string
T=Tension
Mass per unit length
When string is clamped at mid-point
Effecting length becomes 
Thus new Frequency becomes

i.e. New frequency is double of old
so new lowest four resonant frequencies are 100,200,300 and 400 Hz