DC Circuits

Resistivity of a material is defined as the:

Resistance between the opposite faces of a 1 meter cube at a specified temperature

When Current flows through a conductor the conductor will heat up. If the conductor temperature exceeds the insulation rating of the cable then the:

Insulation can be damaged

Six resistors are in parallel. The two lowest-valued resistors are both 1200 ohms. The total resistance

Is less than 600 ohms

KCL is based on the fact that

There cannot be an accumulation of charge at a node

Kirchoff's Voltage Law is based on the law of conservation of ________

Energy

In superpostion theorem, while considering a source, all the other voltage sources are

Shorted

• most common

• ratio of carbon & nonconducting material determine value

• used in DC, AC, and radio receivers

• nonreactive; don't produce imaginary impedance

Carbon composition resistors

• metal wire inside, dimensions determine value

• high precision

• low to moderate values

• not good for AC; have imaginary impedance

• most likely: power rating of 25W

Wire wound resistors

• thin cylindrical film

• least power handling among three

• low to medium values

Film type resistors

• semicon chip

• least power handling due to tiny size

Integrated Circuit resistors

What is the relationship between the load resistor and thevenin resistor and its efficiency

R_L=R_TH and 50%

Resistor connected in parallel with capacitor to discharge it safely

Bleeder Resistor

Introduce new element to nullify effect of another element

Compensation Theorem

A 33-ohm half-watt resistor and a 330-ohm half-watt resistor are connected across a 12 V source. Which one(s) will overheat?

33 ohms

In simple series RLC circuit, _____ corresponds to infinite capacitance and zero inductance.

Purely resistive circuit

If a 10 V DC source has an internal resistance of 5 ohms, what is the next maximum power it can deliver to a load resistor?

5 W

Millman’s Theorem is also known as

Parallel Generator Theorem

After how many time constants, the transient part reaches more than 99 percent of its final value in an RL circuit?

5