physics ques.....

[avid_reader]

An electron and a proton with equal momentaenter a magnetic field perpendicular to the field lines.What is the ratio of the radii of curvature of their trajectories.....

how duz velocity of chrgd particle affect its 1.mass 2.charge.....

write 2 special characteristics of wire of an electric heater.....

name 2 materials used for making standard resistance coils .why are these materials preferred over others...

find the electric field b/w 2 metal plates 5 mm apart connected by a 12v battery...


that's all for now folks ...I will be back soon with more...

[avid_reader]

.................Oh cum on guys some one should be able to solve these questions..............

anticipationg a reply......

[sachinsethi]

here are the answers...
1. ratio of radii = 1.
basically, in both cases, r = p/(e*B)

2. the rest mass of the particle varies wid velocity as -

m' = m/(Root(1-(v^2/c^2)))
no idea abt charge.. i think it does not vary... kindly correct me if i am wrong..

3. wire of an electric heater -
- high resistance.
- high melting point.

4. constantan and manganin
resistivity doesnt vary wid temperature.

5. E = Vd
60 * 10^ (-3)

hope tht helped !

[avid_reader]

Thanx a lot ......
/
/
But you got the last one wrong.....the formula is ..E=V/d
...the ans is 2.4 x10^(-3)......


thanx again...