Answer:
The angle between the magnetic field and the wire’s velocity is 19.08 degrees.
Explanation:
Given that,
Potential difference, V = 53 mV
Length of the wire, l = 12 cm = 0.12 m
Magnetic field, B = 0.27 T
Speed of the wire, v = 5 m/s
Due to its motion, an emf is induced in the wire. It is given by :
Here,
is the angle between magnetic field and the wire’s velocity
So, the angle between the magnetic field and the wire’s velocity is 19.08 degrees.
Answer:
i.e.
Explanation:
Given:
angular speed,
mass of the disk,
radius of the disk,
mass of the chunk,
radius of the chunk,
We know that the angular momentum is given by:
and moment of inertia for a disc:
According to the conservation of angular momentum, the final angular momentum is equal to the initial angular momentum.
Answer:
B) 55 m/h south
Explanation:
Velocity is the rate of displacement per unit of time.
It is mathematically expressed as:
Velocity =
Displacement is the distance covered by a body in a specific direction.
Velocity is different from speed in that it specifies the direction of a body as it travels.
Therefore, we say, velocity is a scalar quantity.
When we are giving velocity values, the unit is expressed with the direction also delineated.
From the given choices, the unit with the south direction and meter per hour is obviously correct.