Professional Electrical Engineering Quiz 5 part 2

A constant current of 2A flows through a circuit element. In 10 seconds, how much net charge passes through the element?

• 0.2 C

• 2 C

• 20 C

• 200 C

Compute the resistance of a copper wire having a diameter of 2.05 mm and a length of 10m.

• 52 Ω

• 5.2 Ω

• 0.52 Ω

• 0.052 Ω

What is the capacitance of a parallel-plate capacitor having rectangular plates 10 cm by 20 cm separated by a distance of 0.1 mm? The dielectric is air.

• 17.7 pF

• 177 pF

• 1,770 pF

• 17,700 pF

A wire of length 1m carries a current of 10 A perpendicular to a field of flux density 0.5 T. Determine the magnitude of the force on the wire.

• 5 N

• 50 N

• 10 N

• 100 N

The apparent power supplied to a load in an ac circuit is 2,000 volt-amperes with a power factor of 0.8 lagging. The reactive power is most nearly:

• 1,200 VAR

• 3,333 VAR

• 1,600 VAR

• 2,500 VAR

Barrier potential of silicon diode is:

• 0.1 V

• 0.3 V

• 0.4 V

• 0.7 V

Which of the following is an active element of a circuit?

• Ideal current source

• Resistance

• Inductance

• Capacitance

A 200 μH coil has a Q of 250 at resonance frequency of 800 KHZ. What is the effective resistance of the coil?

• 1 Ω

• 2 Ω

• 4 Ω

• 8 Ω

Find the capacitive susceptance per mile of a single-phase line operating at 60 HZ. The conductor is Partridge with an outside diameter of 0.642 in, and spacing is 20 ft between centers.

• 5.10 × 10⁴ mho/mi to neutral

• 0.1961 × 10⁴ mho/mi to neutral

• 5.10 × 10⁶ mho/mi to neutral

• 0.1961 × 10⁶ mho/mi to neutral

Which wave form will have the minimum rms value if they have the same peak value of voltage?

• Square wave

• Sine wave

• Triangular wave

• Full wave rectified sine wave