Electric Circuits Answers

Narrate some laws those are violating energy conservation.

voltage=2v resistance=2, current?

A 20 metre length of cable has a cross-sectional area of 1mm2and a resistance of 5 ohms.  Calculate the conductivity of the cable. 

Monochromatic light (l = 500 nm) is incident on a soap bubble (n = 1.40). What is the wavelength of the light (in nm) in the bubble film?

Narrate some laws those are violating energy conservation.

Calculate (i) the equivalent resistance of the circuit shown below and (ii) the current flowing through each resistor. Resistances are R₁ = 100 Ω, R₂ = 50 Ω, R₃ = 50 Ω and R₄ = 75 Ω. The supply voltage is 6 V.        

Each resistance in the diagram below is 2 Ω. Calculate the equivalent (effective) resistance of the circuit, i.e. calculate the equivalent resistance between points A and D.