Test one resistor network

Name the pair of equipment which are working according to static electricity.

• Laser printer and TV_CRT

• Laser printer and Crystal microphone

• crystal microphone and Smart TV

• Smart TV and TV_CRT

What is the definition of the electric current?

(May be more than one answer)

• An electric current is a measurement of second of time over one coulomb through any cross section of a conductor.

• An electric current is a measurement of coulomb per second through any cross section of a conductor.

• An electric current is a measure of the rate of flow of electric charge through a given cross section of a conductor.

• An electric current is a measurement of second per coulomb through any cross section of a conductor.

what is the true and standard current direction respectively in a close circuit ?

• negative to positive and positive to negative

• positive to negative and negative to positive

• positive to negative and negative to ground

• positive to ground and negative to ground

A 8uC electric charge flows through any cross section of a conductor over a period of 4mS. Calculate the current flow

• 2mA

• 0.5A

• 2A

• 0.5mA

What is the voltage and voltage drop respectively ?

• Electron pressure difference between two point in an electric field and the amount of voltage loss that occurs through all or part of a circuit due to impedance.

• the amount of voltage loss that occurs through all or part of a circuit due to impedance and Electron pressure difference between two point in an electric field .

• the amount of voltage gain that occurs through all or part of a circuit due to impedance and Electron pressure difference between any points in an electric field.

• Electron pressure difference between any points in an electric field and the amount of voltage gain that occurs through all or part of a circuit due to impedance.

What are High Voltage & Low Voltage ranges respectively according to IEC 60038:1983

• above 1000Vac or 1500Vdc and Lines between 50 and 1,000 Vac or 120 to 1,500 Vdc

• Lines between 50 and 1,000 Vac or 120 to 1,500 Vdc and above 1000Vac or 1500Vdc

• Lines between 500 and 1,000 Vac or 120 to 1,500 Vdc and below 1000Vac or 1500Vdc

• above 1500Vac or 1000Vdc and Lines between 50 and 1,000 Vac or 120 to 1,500 Vdc

Which factor is inversely proportional to the resistance of a conductor?

• length

• Area

• Resistivity

• Capacitance

There is a conductor that length is 20m, resistance is 2R, the area is 2×10−7𝑚2.

calculate the resistivity, conductance, and conductivity.

• 4×10^−8 Ω𝑚 , 0.5Ω−1 , 0.25×10^8Ω−1𝑚−1

• 2×10^−8Ω𝑚 , 0.5Ω−1 , 0.5×10^8Ω−1𝑚−1

• 4×10^−8Ω𝑚 , 0.5Ω−1 , 0.5×108Ω−1𝑚−1

• 2×10^−8Ω𝑚 , 0.5Ω−1 , 0.25×10^8Ω−1𝑚−1

what is the false statement about the insulator ?

• A materials which doesn't flow electrons

• They have loosely bond electrons

• They are inherently higher resistive

• Lower conductive

What is the false statement of the resistor usage?

• Reduce current flow

• Adjust signal level

• Bias active elements

• It makes current flow one direction