There are several different methods, depending on the particular situation. A few that might occasionally be useful include:
-- Read the label on the package.
-- Measure the mass and multiply by the local acceleration of gravity.
-- Measure the mass AND the local acceleration of gravity, then multiply.
-- Place the object or sample on a bathroom scale.
-- Place the object on one end of a symmetrical see-saw. Through trial and error, determine the weight required on the other end to balance the system.
Answer:
Electric field at a point ( x , y , z) is 
.
Explanation:
Given :
Electric potential in the region is , 
We need to find the electric field .
We know , electric field , 
{ Here r is distance }
In coordinate system ,
{ 
is partial derivative }
Putting all values we get ,
Hence , this is the required solution.
Answer:
Correct option is
A
450 V and 15 A
P
in
=I
p
V
p
⇒T
p
=
V
p
P
in
=
200N
3000W
=15A
Efficciencyofthetransformer
η=
P
in
P
out
=
V
p
I
p
V
s
I
s
⇒
100
90
=
3000
6V
s
V
s
=
100×6
90×5000
=450V
Hence,
option (A) is correct answer.
Here are the answers:
1. False - Molecules is the smallest part of an element that behaves like the element.
2. False - The nucleus contains both protons and neutrons
3. True
4. True
5. A. Nucleus
6. D. Neutron
7. B. Protons and Neutrons
8. C. Electron
9. C. 6
10. C.6
