Question

Define resistance of a conductor. State the factors on which resistance of a conductor depends. Name the device which is often used to change the resistance without changing the voltage source in an electric circuit.
Calculate the resistance of 50\ \text{cm}50 cm50, space, start text, c, m, end text length of wire of cross sectional area 0.01\ \text{mm}^20.01 mm
2
0, point, 01, space, start text, m, m, end text, squared and of resistivity 5\times10^{-8}\ \Omega\text m5×10
−8
Ωm5, times, 10, start superscript, minus, 8, end superscript, space, \Omega, start text, m, end text.​

Answer 1

Answer:

x varies inversely as square of y . Given that y = 3 for x = 1 , find the value of x for y = 4.

Answer 2

Explanation:

In the given circuit, the two 2Ω resistors are in series with each other and these resistors are in parallel with other two 2Ω resistors which are in series with each other.