Answer:
Silver has least resistance
Explanation:
The given data :-
i) Since the diameter of each wire is same so the area of each wire is same i.e A₁ = A₂ = A₃.
ii) Length of each wire is same i.e L₁ = L₂ = L₃.
iii) Resistivity of copper ( ρ₁ ) = Ω.m
iv ) Resitivity of aluminum ( ρ₂ ) = Ω.m
v ) Resitivity of silver ( ρ₃ ) = Ω.m
Resistance is given by
Since the area and length are same of all three wire so it becomes constant.
R ∝ ρ
So by observing the resistivity of all three wire.
ρ₃ < ρ₁ < ρ₂
Therefore the wire silver has least resistance since it has least value of resistivity.
Answer:
The angular velocity of the wheel in terms of d, F, and I is, ω = d/t (F/I α) s⁻¹
Explanation:
Given,
The angular velocity ω
The displacement d
The magnitude of the applied force, F
The moment of inertia of the wheel I = mr²
The angular velocity can be written as
ω = v /r
where,
v - linear velocity
r - radius of the wheel
ω = d/t (1/r) (∵ v = d /t)
The force can be written as,
F = m a
= m α r (∵ a = α r)
Multiplying both sides by r
F r = m r² α
F r = I α (∵ I = mr²)
r = I α / F
Substituting in the above equation for ω
ω = d/t (F/I α) s⁻¹
Hence, the angular velocity of the wheel in terms of d, F, and I is, ω = d/t (F/I α) s⁻¹
the average kinetic energy of the particles in an object is directly proportional to its TEMPERATURE.