Answer:
a) τ = 1.039*10⁻⁴N-m
b) The net torque acting on the loop is zero, but the loop continues to rotate in a counterclockwise direction.
Explanation:
A) Given
I = 0.5 A
B = 0.3 T
a = 4 cm = 0.04 m
b = 2 cm = 0.02 m
θ = 30°
The torque τ acting on a current-carrying loop of area A due to the interaction of the current I flowing through the loop with a magnetic field of magnitude B is given by
τ = I*B*A*Sin∅
where ∅ is the angle between the normal to the loop and the direction of the magnetic field.
The area A of a rectangular loop of wire with height 4.00 cm and horizontal sides 2.00 cm can be obtained as follows
Aloop = a*b ⇒ Aloop = 0.04 m*0.02 m = 8*10⁻⁴m²
Recalling that θ is the angle between the sides of length b and B and if we consider the normal to the loop, the angle ∅ between the normal and the magnetic field is given by
∅ = 90°-θ ⇒ ∅ = 90°-30° = 60°
Then, the torque will be
τ = (0.5 A)*(0.3 T)*(8*10⁻⁴m²)*Sin60° = 1.039*10⁻⁴N-m
b) We have to get the net torque τ about the vertical axis of the current loop due to the interaction of the current with the magnetic field.
The angle ∅ between the normal to the loop and the magnetic field when the horizontal sides of the loop of length b are perpendicular to B is
∅ = 0°
Then
τ = (0.5 A)*(0.3 T)*(8*10⁻⁴m²)*Sin 0° = 0 N-m
We can say that the net torque acting on the loop is zero, but the loop continues to rotate in a counterclockwise direction.
Distance = speed x time
= 1.5 x 6
= 9m
Answer:
convinience store
Explanation:
convenience store are more like retail store providing everyday goods.
since this kind of store is usually small, maybe not as big as a department store, there is a growing number of such stores creating competitive pressures as such many are providing better value with private-label merchandise (more like re-branding or personalizing the products in the store)
