A resistor with an unknown resistance is connected in parallel to a 12 2 resistor. When both resistors are connected to an emf source of 12 V. the main current is measured with an ammeter to be 3.0 A. What is the resistance of the unknown resistor? a. 32 b. 62 C. 92 d. 12 2 19 O a Ob Oc Od

A resistor with an unknown resistance is connected in parallel to a 12 2 resistor. When both resistors are connected to an emf source of 12 V. the main current is measured with an ammeter to be 3.0 A. What is the resistance of the unknown resistor? a. 32 b. 62 C. 92 d. 12 2 19 O a Ob Oc Od

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 11OQ: When resistors with different resistances are connected in series, which of the following must be...

See similar textbooks

Related questions

Q: When a resistor is connected to a 12 V source, it draws a 185 mA current. The same resistor…

A: Ans:- Image-1

Q: 10. A 4 N and a 6N resistor are connected in series, the current is measured to be 4 A. (d) What is…

Q: A40 resistor is connected in series with the parallel assembly of3 2 and 6 Oresistors. The current…

Q: 1. The figure below shows the resistors -a combination of series and parallel. We can consider R1 to…

Q: A circuit has a 62.1Ω resistor, a 71 and a 47.2 resistor all connected in parallel with each other.…

A: R1 = 62.1 Ω R2 = 71 Ω R3 = 47.2 Ω

Q: Q3(a) Design an electrical circuit with 3 resistors out of which 2 resistors must be connected in…

Q: A total resistance of 3.34 2 is to be produced by connecting an unknown resistance to a 12.29 2…

Q: The emf source, ε=4.5 V, of the circuit shown in the figure has negligible internal resistance. The…

Q: Three identical resistors are connected in series to a battery. If the current of 12 A flows from…

Q: A total resistance of 3.14 2 is to be produced by connecting an unknown resistance to a 12.29…

Q: A total resistance of 3.212 is to be produced by connecting an unknown resistance to a 12.16…

A: When resistors are connected in series, their equivalent resistance is given as R=R1+R2+... And when…

Q: 04a. Find the resistance of an electric toaster which draws a current of 6.62 A when plugged into a…

Q: 2. The circuit in the figure on the right shows a network of resistors connected in series and in…

A: We are allowed to give the explanation of first question only which is given below. Please repost…

Q: 11. A 22 O resistor and a 33 O resistor are connected in series and are connected to a 120 V power…

A: 11. solution- Given that, R1= 22 ohm R2= 33 ohm E= 120 v

Q: 4. Three 60.0-W, 120-V lightbulbs are connected across a 120-V power source, as shown in Figure…

A: (a) Consider the resistance of the each bulb is, R=V2P=120 V260 W=240 Ω The equivalent resistance of…

Q: 10. A 4 N and a 6 N resistor are connected in series, the current is measured to be 4 A. (a) Draw a…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Multiple-Concept Example 9 reviews the concepts that are important to this problem. A light bulb is…

A: Step 1

Q: A total resistance of 3.27 is to be produced by connecting an unknown resistance to a 12.04…

Q: (3) A battery whose emf is 6 V is connected to a 202 resistor. The voltage drop across the 22…

Q: 5. A 60.0-W lamp is placed in series with a resistor and a 120.0-V source. If the voltage across the…

Q: 94. The total resistance R of three resistors in parallel is given by RR2R3 R R¡R2 + R,R3 + R,R3…

A: The expression for the total resistance is given as R=R1R2R3R1R2+R1R3+R2R3 Substituting the values…

Q: A battery with an emf of 12 V and an internal resistance of 0.8 ohm is to be recharged through a 20…

Q: Three identical 12 Q resistors are connected to a variable source in a mixed circuit. The circuit…

Q: QUESTION 5 "Which of the following resistors dissipate more power, if connected across the same…

Q: Thermal energy is produced in a resistor at a rate of 127 W when the current is 3.99 A. What is the…

Q: An automobile battery has an emf of 12.6 V and an internal resistance of 0.08 Ω. The headlights have…

A: (a) The current flows across the headlight bulbs is, ε=IR+rI=εR+r=12.6 V5.0 Ω+0.08 Ω=2.48 A (b) The…

Q: You have a parallel circuit in a house that operates on 120 V with several outlets for plugging in…

Q: The table below has information about different resistors in a simple circuit. What would the…

Q: A total resistance of 3.27 Q is to be produced by connecting an unknown resistance to a 12.06 a…

Q: The rear window defrosters on automobiles are made up of several strips of heater wire connected in…

Q: set up is such that there are three similar resistors, each of 20 ohms resistance. Two of them are…

A: Given data: Value of resistance of each resistor is, R1=R2=R3=20 Ω. Maximum power consumed by each…

Q: Two resistors, 60.7 and 68.3Ω, are connected in parallel. The current through the 68.3-Ω resistor is…

A: Given value--- Two resistors, 60.7 and 68.3Ω, are connected in parallel. The current through the…

Q: In the circuit shown in the figure Nul yw arweed (a) What is the equivalent resistance? (b) What is…

A: (a) equivalent resistance RT=7.41 ohms (b)current through 25 ohm resistor I25=0.259 A c) current…

Q: The ammeter your physics instructor uses for in-class demonstrations has internal resistance r =…

Q: Thermal energy is produced in a resistor at a rate of 102 W when the current is 2.56 A. What is the…

A: Given data: Power (P) = 102 W Current (I) = 2.56 A Required: The resistance (R)

Q: Integrated ConceptsA short circuit to the grounded metal case of an appliance occurs as shown in…

A: The current in the circuit will be, I=VR

Q: What are the largest and smallest resistances (in ) you can obtain by connecting a 35.0 , a 58.0 ,…

A: Given: The resistance of the resistors are 35 Ω, 58 Ω and 750 Ω.

Q: A 1.00-MΩ voltmeter is placed in parallel with a 75.0-k Ω resistor in a circuit.…

Q: Q8. A 4 µF capacitor is charged to 24 V and then connected across a 200 2 resistor. Find (a) the…

Q: Thermal energy is produced in a resistor at a rate of 102 W when the current is 2.92 A. What is the…

Q: A total resistance of 3.26 is to be produced by connecting an unknown resistance to a 12.34 Q…

Q: - Three resistors, 250, 450, and 750, are connected in series, and a 0.51-A current passes through…

A: 1. The correct option is (c) 145 ohm 2. The correct option is (d) 9 Volts 3. The power is 1786 Watts…

Q: 4) A battery with unknown emf (e) and internal resistance (r) is connected 7 puan to a circuit that…

A: 0.5 ohm

Q: A40 resistor is connected in series with the parallel assembly of3 Q and 6 Oresistors. The current…

Q: A storage battery of emf 8.0 V and internal resistance 0.5 Ω is being charged by a 120 V dc supply…

A: The effective voltage in the circuit is The current flowing in the circuit is

Q: In the figure below is a circuit with four resistors and a battery. The battery has an emf of E =…

Q: 4) A battery with unknown emf (ɛ) and internal resistance (r) is connected to a circuit that…

Q: An 1330 W toaster and an 803 W microwave oven are connected in parallel to the same 15.0 A, 120 V…

A: The following problem involves the basic concepts of household circuits. Series and parallel…

Question

100%

A resistor with an unknown resistance is connected in parallel to a 12 Q resistor. When both resistors
are connected to an emf source of 12 V, the main current is measured with an ammeter to be 3.0 A.
What is the resistance of the unknown resistor?
a. 30
b. 60
19
C. 90
d. 122
Oc
Od

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

Figure P29.45 shows five resistors connected between terminals a and b. a. What is the equivalent resistance of this combination of resistors? b. What is the current through each resistor if a 24.0-V battery is connected across the terminals?
A battery has an emf of 15.0 V. The terminal voltage of the battery is 11.6 V when it is delivering 20.0 W of power to an external load resistor R. (a) What is the value of R? (b) What is the internal resistance of the battery?
Consider the circuit shown in Figure P28.21 on page 860. (a) Find the voltage across the 3.00-0 resistor, (b) Find the current in the 3.00-12 resistor.
A child's electronic toy is supplied by three 1.58-V alkaline cells having internal resistances of 0.0200 inseries with a 1.53-V carbon-zinc dry cell having a 0.100- internal resistance. The load resistance is 10.0 . (a) Draw a circuit diagram of the toy and itsbatteries, (b) What current flows? (c) How much power is supplied to the load? (d) What is the internal resistance of the dry cell if it goes bad, resulting in only 0.500 W being supplied to the load?
A car battery with a 12-V emf and an internal resistance of 0.050 is being charged with a current of 60 A. Note that in this process the battery is being charged. (a) What is the potential difference across its terminals? (b) At what rate is thermal energy being dissipated in the battery? (c) At what rate is electric energy being converted to chemical energy? (d) What are the answers to (a) and (b) when the battery is used to supply 60 A to the starter motor?
The- pair of capacitors in Figure P28.63 are fully charged by a 12.0-V battery. The battery is disconnected, and the switch is then closed. Alter 1.00 ms has elapsed, (a) how much charge remains 011 the 3.00-F capacitor? (b) How much charge remains on the 2.00-F capacitor? (c) What is the current in the resistor at this time?
Four resistors are connected to a battery as shown in Figure P21.40. The current in the battery is I, the battery emf is , and the resistor values are R1 = R, R2 = 2R, R3 = 4R, and R4 = 3R. (a) Rank the resistors according to the potential difference across them, from largest to smallest. Note any cases of equal potential differences. (b) Determine the potential difference across each resistor in terms of . (c) Rank the resistors according to the current in them, from largest to smallest. Note any cases of equal currents. (d) Determine the current in each resistor in terms of I. (e) If R3 is increased, what happens to the current in each of the resistors? (f) In the limit that R3 , what are the new values of the current in each resistor in terms of I, the original current in the battery? Figure P21.40
A student makes a homemade resistor from a graphite pencil 5.00 cm long, where the graphite is 0.05 mm indiameter. The resistivity of the graphite is =1.38102/m . The homemade resistor is place inseries with a switch, a 10.00-mF capacitor and a 0.50-V power source, (a) What is the BC time constant of the circuit? (b) What is the potential drop across the pencil 1.00 s after the switch is closed?
When resistors with different resistances are connected in series, which of the following must be the same for each resistor? Choose all correct answers. (a) potential difference (b) current (c) power delivered (d) charge entering each resistor in a given time interval (e) none of those answers
In the circuit of Figure P28.30, determine (a) the current in each resistor and (b) the potential difference across the 200- resistor.
Three 100- resistors are connected as shown in Figure P21.41 The maximum power that can safely be delivered to any one resistor is 25.0 W. (a) What is the maximum potential difference that can be applied to the terminals a and b? (b) For the voltage determined in part (a), what is the power delivered to each resistor? (c) What is the total power delivered to the combination of resistors?
A 12.0-V emf automobile battery has a terminal voltage of 16.0 V when being charged by a current of 10.0 A. (a) What is the battery’s internal resistance? (b) What power is dissipated inside the battery? (c) At what rate (in °C/min ) will its temperature increase if its mass is 20.0 kg and it has a specific heat of 0.300 kcal/kg • °C, assuming no heat escapes?