Trina makes a diagram to summarize how to use the right-hand rule to determine the direction of the magnetic force on each type
of charge.
Which labels belong in the regions marked X, Y, and Z?
A) X: Thumb, for velocity
Y: Fingers, for magnetic field
Z: Palm of hand, for force
B) X: Back of hand, for force
Y: Thumb, for velocity
Z: Palm of hand, for force
C)X: Palm of hand, for force
Y: Thumb, for velocity
Z: Fingers, for magnetic field
D) X: Palm of hand, for force
Y: Fingers, for magnetic field
Z: Back of hand, for force
Which labels belong in the regions marked X, Y, and Z?
A) X: Thumb, for velocity
Y: Fingers, for magnetic field
Z: Palm of hand, for force
B) X: Back of hand, for force
Y: Thumb, for velocity
Z: Palm of hand, for force
C)X: Palm of hand, for force
Y: Thumb, for velocity
Z: Fingers, for magnetic field
D) X: Palm of hand, for force
Y: Fingers, for magnetic field
Z: Back of hand, for force
2 answers:
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Answer:
Option D is the correct answer.
Explanation:
Stress is the force per unit area that tend to change the shape of body.
Stress is defined as internal resistive force per unit area.
So, so stress distributed over an area is best described as internal resistive force.
Option D is the correct answer.
Answer:
Explanation:
The given data :-
- Diameter of rod AB ( d₁ ) = 200 mm.
- Diameter of rod BC ( d₂ ) = 150 mm.
- The linear co-efficient of thermal expansion of copper ( ∝ ) = 1.6 × 10⁻⁶ /°C
- The young's modulus of elasticity of copper ( E ) = 120 GPa = 120 × 10³ MPa.
- Consider the required temperature increase to close the gap at C = T °C
- Consider the change in length of the rod = бL
Solution :-
The angular acceleration of a rotating object is given by
where
is the final angular speed of the object
is its initial angular speed
is the time taken to accelerate
For the wheel in our problem,
, 
and 
, so its angular acceleration is
where
For the wheel in our problem,