A square plate of length 4 metre and thickness 0-2 metre is shown in
B
the figure. Calculate its resistance
if current enters and leaves
(through the terminals A & A) as
shown in the figure. The specific
resistance of the material of the
plate is 2 x 10-8 ohm x m.
Answers
Answered by
1
Answer:
The resistance is given by
R=
A
ρL
here, metal plates A and B are of the same material hence, ρ is same for both the plates.
Now, L
A
=l and L
B
=2l
As thickness t, of both the plates is same
⇒A
A
=2l
2
+2lt+2lt
∴A
A
=2l
2
+4lt
∴A
A
=2l(l+2b)
and similarly A
B
=4l(l+2b)
Now,
R
B
R
A
=
L
B
A
A
L
A
A
B
R
B
R
A
=
2l×2l(l+2b)
l×4l(l+2b)
R
B
R
A
=1
Answered by
0
Answer:
The resistance is given by
R=AρL
here, metal plates A and B are of the same material hence, ρ is same for both the plates.
Now, LA=l and LB=2l
As thickness t, of both the plates is same
⇒AA=2l2+2lt+2lt
∴AA=2l2+4lt
∴AA=2l(l+2b)
and similarly AB=4l(l+2b)
Now,
RBRA=LBAALAAB
RBRA=2l×2l(l+2b)l×4l(l+2b)
RBRA=1
Explanation:
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