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Prob. Set 3 (Grp.7)

The document is a student assignment containing 7 practice problems related to electricity, current, resistance, electromotive force, and Ohm's law. The student is asked to solve each problem by identifying given and required physical quantities, illustrating the circuit diagram, and showing the complete solution. The problems involve calculating resistivity, resistance, current, voltage, power, and filling in tables for series, parallel and combination circuit configurations.

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Henry Hnry
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116 views5 pages

Prob. Set 3 (Grp.7)

The document is a student assignment containing 7 practice problems related to electricity, current, resistance, electromotive force, and Ohm's law. The student is asked to solve each problem by identifying given and required physical quantities, illustrating the circuit diagram, and showing the complete solution. The problems involve calculating resistivity, resistance, current, voltage, power, and filling in tables for series, parallel and combination circuit configurations.

Uploaded by

Henry Hnry
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Bulacan State University

COLLEGE OF SCIENCE
City of Malolos, Bulacan

The journey to excellence starts here.

Name:Bustillos, Hanz, Mendoza, Stephen John, Romero, Czar Henry


Course, Yr & Sec: BSM BA-2A Student No:
Professor: Rosario Poñado Date:03/11/23 Score:

PHY 202 – Electricity, Sounds and Lights


Problem Exercise 3 – Current, Resistance, Emf and Ohm’s Law

Direction: For every problem, illustrate and identify all the given physical quantities
as well as the required ones and show complete solutions neatly on the spaces
provided.

1. A 0.1-m long nichrome wire has a cross-sectional area of 0.1 mm 2. A 1.0-V


potential difference is impressed between its ends which causes a 2.0 A current.
Calculate the resistivity of the nichrome wire used.

2. 2x10-6Ω-m. A 15-V electric potential is applied across the ends of the resistor
causing a 4.0x10-3 A current. Find (a) the resistance of the resistor and (b) the
resistor’s length.

3. A 10-W light bulb is connected into a 220-V outlet. (a) What is the resistance of
the bulb? (b) What is the current in the bulb? (c) If the light bulb is turned on for a

1
month (30 days) and the electric energy cost P1.50/kW-h, how much is the
electric bill?

4. From the circuit shown, determine the resistance between terminals a and
b.

1Ω 2Ω 3Ω 4Ω 5Ω

a b

2
5. Complete the table using the given three resistors and a power supply
below with their respective resistances and voltage as:
R1 = 3Ω R2 = 9 Ω R3 = 18 Ω ξ = 12 Volts

SERIES PARALLEL
UNKNOWN
CONNECTION CONNECTION
RT 30Ω 2Ω
I1 0.4Ω 4A
I2 0.4Ω 1.33 A
I3 0.4Ω 0.67 A
IT 0.4Ω 6A
V1 1.2 v 12 v
V2 3.6 v 12 v
V3 7.2 v 12 v
VT 12 v 12 v

3
6. Complete the table using the given three resistors and a power supply
below with their respective resistances and voltage as:
R1 = 3Ω R2 = 9 Ω R3 = 18 Ω ξ = 12 Volts

SERIES - PARALLEL PARALLEL - SERIES


UNKNOWN
COMBINATION COMBINATION
RT 9Ω 2.7 Ω
I1 1.33 A 4A
I2 0.89 A 0.44 A
I3 0.45 A 0.44 A
IT 1.33 A 4.44 A
V1 3.99 A 12 v
V2 8.01 A 3.96 v
V3 8.01 A 7.92 v
VT 12 v 12 v

4
7. For the network shown, completely fill the table below, if a 120-V source were
connected across the open end of the circuit.
R1

R4 R2
a b

R3

R, Ω I, A V, V P, W

R1 1.0 14.52 A 14.52 V 210.83 W

R2 2.0 7.26 A 14.52 V 105.42 W

R3 3.0 4.84 A 14.52 V 70.28 W

R4 4.0 26.37 A 105.48 V 2781.51 W

RT 4..55 Ω 26.37 A 120 3164.4 W

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