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FIVIZZ: WEEK 8 - PHYSICS 3

Total questions: 10

Worksheet time: 10mins

Name
Class
Date
1.

This is a

a)

capacitor

b)

resistor

c)

inductor

2.

Based on the diagram, select the correct answers

a)

A is lagging B

b)

C is leading A and B

c)

A and B are leading C and D

d)

A is leading B but lagging to C

3.

A 400 mH coil of negligible resistance is connected to an AC circuit in which an effective current of 6 mA is flowing. Find out the voltage across the coil if the frequency is 1000 Hz.

a)

V = 15.079V (RMS)

b)

V = 21.844V (RMS)

c)

V = 7.536V(RMS)

d)

V = 10.922V (RMS)

4.

Find the impedance of a series RLC circuit if the inductive reactance, capacitive reactance and resistance are 184 Ω, 144 Ω and 30 Ω respectively

a)

30Ω

b)

50Ω

c)

25Ω

d)

70Ω

5.

A 500 μH inductor, 80/π2 pF capacitor and a resistor are connected to form a series RLC circuit. Calculate the resonant frequency of this current.

a)

1250 KHz

b)

1900 KHz

c)

2500 KHz

d)

1600 KHz

6.

The equation for an alternating current is given by i = 77 sin 314t. Find the frequency.

a)

75Hz

b)

25Hz

c)

100Hz

d)

50Hz

7.

If an R = 1-kΩ resistor, a C = 1-µF capacitor, and an L = 0.2-H inductor are connected in series with a V = 150 sin (377t) volts source, what is the maximum current delivered by the source?

a)

27mA

b)

34mA

c)

54mA

d)

68mA

8.

A high-voltage powerline operates at 500 000 V-rms and carries an rms current of 500 A. If the resistance of the cable is 0.050Ω/km, what is the resistive power loss in 200 km of the powerline?

a)

2.5 Megawatts

b)

250 kW

c)

500 kW

d)

1 Megawatt

9.

Calculate the capacitive reactance of a 10uF capacitor at 100 kHz.

a)

0.159 Ω

b)

1.592 Ω

c)

0.318 Ω

d)

3.183 Ω

10.

What is the average power dissipation in an RLC series circuit with R = 10Ω, L = 0.1 H, C = 10 µF when driven at resonance by a 100 V-rms source?

a)

1000 W

b)

500 W

c)

2000 W

d)

100 W