Categories
Ask Physics Neglecting Project vertical acceleration vertical velocity

Horizontal projectile and freely falling body

A rifle at a height H aimed horizontally fires a bullet to the ground. At the same time , a bullet with the same mass in dropped from the same height. Neglecting air resistance, which one hits the ground first?Explain.
ED posted
Answer:
Both will hit t…

Categories
Ask Physics conservative forces inverse square law Project Similarities similarities differences

What are the similarities and differences in magnetic and electric field?

Similarities and differences in magnetic and electric field (Dilpreet posted this question)
Similarities
Differences
 Both electric and magnetic field are conservative forcesBoth obey inverse square law
Both are non contact forces (Forces can be exert…

Categories
Ask Physics Electricfield Project sajad varying magnetic field

Electricfield, Magnetic Field and Photon

We know that photon has no charge. Then where from it gets electric and magnetic field in light?
Malik Sajad asks
Answer:
Electric and magnetic fields are not produced by the photon; it is massless too.
But, photon is created by time varying electric a…

Categories
Ask Physics caption escape velocity Project relativistic travel Relativity time dilation TWIN twin paradox

What is twin paradox?

TWIN PARADOX is a paradoxical situation coming in while explaining the theory of relativity. “Time dilation” is one of the important consequences of relativity. It says that if a body is moving with relativistic speeds, time will dialate …

Categories
alternating currents Ask Physics direct currents energy loss Project

Why direct currents aren’t used in Home circuits?

How can an alternating current change its direction while moving in a wire or any conductor? Why direct currents aren’t used in Home circuits?
RAHUL ASKED
Answer:
Alternating current is produced by rotating a coil in a strong magnetic field (or …

Categories
Ask Physics first body Project SOUNDARYA t2 tower

A body is dropped from a tower of height 96 m. Another body is thrown up from the ground after a second with a velocity of 40 m/s.When and where they will meet?

A body is dropped from a tower of height 96 m. Another body is thrown up from the ground after a second with a velocity of 40 m/s. When and where they will meet?
SOUNDARYA asked
 Answer:
For the first body,
u=0 m/s
Let S=x (from top)
x=0.5 gt2  &#…

Categories
Ask Physics displacement sensors eddy current brakes eddy current separator eddy current testing induction meters Project

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 …