Eddy currents and applications

What ere Eddy currents and what is their application?
Rahul asked
Answer: 
Eddy currents (also called Foucault currents) are currents induced in conductors, when the magnetic flux linked with a solid conductor changes. The change in magnetic flux can …

Sequence of Learning Physics

In what sequence should these chapters be prepared for my exams:-
units and dimensions,kinematics,laws of motion,work power and energy,motion of system of particles and rigid body dynamics,gravitation.
Apoorv Katoch asked
Answer:
It is better to follow…

Problem from relative velocity

A Boat covers certain distance between two spots in a river taking t1 hrs going downstream and t2 hrs going upstream. What time will be taken by boat to cover same distance in still water?
posted by STUTI
Answer:
Incoming search terms:relative velocity…

A Physics homework problem based on projectile motion and reaction time

A missile is launched and travels at 309m/s. If the operator discovers that the missile is locked on the wrong target and must be detonated by remote signal before impact, how far will the missile travel if the operator’s reaction time to send…

The problem of a rock thrown vertically up

A rock is thrown vertically upward from the ground with an initial speed 15m/s.
a. how high does it go b. how much time is required for the rock to reach its maximum height? c. what is the rock’s height at t=2.00s?
(Posted by Merhawi)
Answer:
(a)
u=15m/s
a=-10m/s2
v=0 m/s […]

Homework from Projectile Motion

A projectile is projected at an angle theta with horizontal with speed u . If air resistance is taken in account , the angle with vertical at the time of hitting the ground will be a)more than (90 + theta) b)less than (90 – theta) c)(90 + theta…

A simple numerical on momentum

Car mass is 1200 kg moving velocity is 108 km/hr. On applying brakes velocity reduced to 36 km/hr. Find change in momentum?
(posted by Aditi)
Answer: m=1200 kg
u=108 x 5/18=30m/s
v=36×5/18=10m/s
Change in momentum = m(v-u) = 1200 x (30-10)=1200 …