Electric Circuits Answers

A current of one ampere is passed through a straight wire of length 2 metre. The magnetic field at a point in air at a distance of 3 m from one end of the wire but lying on the axis of the wire will be

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?

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.