Science
A copper wire has a length L = 2 m, a cross-sectional area A = 0.5 mm2, and resistivity ρ = 1.7 × 10-8 Ωm. Calculate the resistance of another wire made of the same material whose length is twice the length of the wire but has the same cross-sectional area.
Related Questions
Study the circuit and find out-
(a) Current in 12 ohm resistor
(b) Difference in the readings of ammeter A1 and A2 if any
You are given four resistors each having resistance of R ohm. Find the maximum and minimum resistance that can be made with these four resistors.
The below image shows a corrective measure for a particular defect of vision.
(a) Identify the defect of vision and state what kind of lens is used to correct this deficiency.
(b) Draw and label a ray diagram that shows the defect of vision in the above case before correction.
(a) What is dispersion of light?
(b) Explain the condition under which dispersion happens?
(c) Give one reason that causes presbyopia.