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Electrical Engineering

Verifying Voltage Measurement

The circuit shown in the attached figure was built in the laboratory and V0 was measured to be 6.25V. Verify this measurement using the voltage divider principle, whether measured result is consistent with the figure.

Current through the inductor

A security alarm for an office building door is modeled by the circuit as shown in the attachment. The switch represents the door interlock, and V is the alarm indicator voltage. Find the current through the inductor, iL(t), for t>0. The switch has been closed for a long time at t=0.

Sketch the dependence of l versus h on cartesian axes.

The distance l from a point at a height h above the Earth's surface to the horizon can be approximated using Pythagoras theorem by the expression: l = h * SQRT(1 + (2*re/h)) , where re is the radius of the Earth. (a) Sketch the dependence of l versus h on Cartesian axes. (b) Thus determine approximations for l by taking l