Answer:
B = 0.8 T
Explanation:
It is given that,
Radius of circular loop, r = 0.75 m
Current in the loop, I = 3 A
The loop may be rotated about an axis that passes through the center and lies in the plane of the loop.
When the orientation of the normal to the loop with respect to the direction of the magnetic field is 25°, the torque on the coil is 1.8 Nm.
We need to find the magnitude of the uniform magnetic field exerting this torque on the loop. Torque acting on the loop is given by :
B is magnetic field
So, the magnitude of the uniform magnetic field exerting this torque on the loop is 0.8 T.
The power in every scenario is the same. Power is the measurement of the energy transfer over time.
<h3>
What is power?</h3>
Power is the measurement of the energy transfer over time. It can be calculated by the formula,
Where,
- power
- work
- time
In scenario A,
In scenario B,
In scenario B,
Therefore, the power in every scenario is the same.
Learn more about Power:
brainly.com/question/1618040
Answer: Option B) 1038J
Explanation:
Given that
Mass of person (m) = 83kg
kinetic energy (KE) = ?
Speed of elevator (v) = 5m/s
Kinetic energy is the energy possessed by a moving object. It is measured in joules, and depends on the mass (m) of the object and the speed (v) by which it moves
i.e K.E = 1/2mv²
KE = 1/2 x 83kg x (5m/s)²
KE = 0.5 x 83 x 25
KE = 1037.5J (Round the kinetic energy to the nearest whole number as 1038J)
Thus, the kinetic energy of the person is 1038 Joules
Answer:
The identifying characteristics are zero electrical resistivity below a critical temperature, zero internal magnetic field and a critical magnetic field above which superconductivity ceases.
Explanation:
Superconductor material classes include chemical elements (example: mercury or lead)
