Round - 2

Straight line plot of current and voltage for a transistor circuit is called

• AC input line

• DC input line

• DC load line 

• AC load line

In a 20 Vac series RC circuit, if 20 V is measured across the resistor and 40 V is measured across the capacitor, the applied voltage is:

• 45 V

• 50 V

• 55 V

• 60 V

What is the total inductance, assuming no mutual inductance?

• 12 mH

• 6 mH

• 0.73 mH

• 0 mH

Power per unit area of a specified distance for the LED is referred to as

• Emission

• Radiation

• Irradiance

• Refraction

In a purely inductive circuit,

• Current leads voltage by 90°

• Voltage lags current by 90°

• Voltage leads current by 90

• Voltage and current are in phase (0°)

What is the permeability of transformer iron?

• 50

• 450

• 1,500

• 5,500 

If 60 J of energy are available for every 15 C of charge, what is the voltage?

• 4 V 

• 60 V

• 15 V

• 0.25 V

When is a capacitor fully charged?

• when the voltage across its plates is of the voltage from ground to one of its plates

• when the current through the capacitor is the same as when the capacitor is discharged

• when the voltage across the plates is 0.707 of the input voltage

• When the current through the capacitor is directly proportional to the area of the plates

What is the color code for a 220  5% resistor?

• Red, Red, Brown, Gold 

• Orange, Orange, Black, Gold

• Red, Red, Black, Gold

• Red, Red, Brown, Silver

Current will cause a magnetic field in a conductor as follows:

• An ac current causes a fixed polarity magnetic field.

• A dc current causes a fixed polarity magnetic field. 

• A dc current causes an alternating magnetic field.

• An ac current causes a fixed polarity magnetic field and a dc current causes an alternating magnetic field.