Physics question and answers for December 14, 2023
- Q What must be the diameter of a cylindrical 120 m long metal wire if its resistance is to be 6 0 22 The resistivity of this metal is 1 68...
- Q are connected in parallel with a 24 V battery 1 Draw the circuit include a voltmeter for each resistor and an ammeter to read total current an current through the...
- Q Consider the circuit shown below 1 Using only symbols write an equation based on the current junction rule current continuity at point A 2 Using only symbols write TWO equations...
- Q A series circuit contains one 30 ohm resistor one 50 ohm resistor and a 100 volt battery It includes an ammeter such that it reads the current passing through the...
- Q 5 The length of a copper wire is cut in half By what factor does the resistance change DA 1 4 OB 1 2 DC 2 OD 4 DE I...
- Q 2 A circuit has 3 A of current How long does it take 45 C of charge to travel through the circuit OA 3 S OB 5 S OC 15...
- Q The resistors in the circuit below have the following valu
- Q 5 How much voltage is needed in order to produce a 0 70 A current through a 490 Q resistor OA 114 V OB 267 V OC 343 V OD...
- Q A home uses 400 kWh of electricity during peak hours and 300 kWh during off-peak hours. The power company charges 15/kWh for peak consumption and 10/kWh for off-peak use. How...
- Q A resistor is measured to have a resistance of 252 Q. What is the potential difference across the resistor when it carries a current of 75.0 mA?18900 V16.4 V3.36 V18.9...
- Q What is the potential difference across the terminals of a battery if 45 kJ of energyis required to move 500.0 C of charge?0.090 V22 500 V90 V9.0 V
- Q Two identical batteries each of emf E = 2 volt and internal resistance r = 1 ohm are available to produce heat in an exlernal resistance by passing a current...
- Q The resistivity of gold is 2.44 10-8 m at a temperature of 20C. A gold wire, 1.8 mm in diameter and 14 cm long, carries a current of 480 mA....
- Q A motor is 80% efficient. How much usefull work can the motor do if it is supplied with 200kW.h of energy?
- Q Show that the drift speed of free electrons in a wire does not depend on the cross-sectional area of the wire.
- Q The heater element of a particular 120-Vtoaster is a 8.9-m length of nichrome wire,whose diameter is 0.86 mm. The resistivity ofnichrome at the operating temperature of thetoaster is 1.3 10-6....
- Q In the circuit below, all four resistors are identical (R? = R? = R3 = R? = R) and the battery has a voltage of 4.82 V.(a) When the switch...
- Q When you attach a 1.00 m long section of wire to the ends of a 1.50 V battery you measure the current in the wire to be 8.00 A. If...
- Q The length of a certain wire is kept same while its radius is doubled. What is the newresistivity of this wire?E) It does not change.C) It is reduced by a...
- Q Equal potentials are applied on an iron and a copper wire of same length. In order to have the same current flow in the two wires, the ratio r (iron)...
- Q Which of these statements is true about resistors connected in series?Both the current passing through and the potential drop across each resistor are different.The same amount of current will pass...
- Q A small insect crawls in the direction of electron drift along copper wire that carries a current of 2.56A. It travels with drift speed of the electron in the wire...
- Q Three charges are arranged in the (x, y) plane as shown. What is the magnitude of the resulting force (in nano-Newtons) on the -9 nC charge at the origin? The...
- Q Four resistors are arranged in a circuit, as shown. There is a constant voltage Vacross the voltage source. The current / is 0.25 ampere.(a) Find the equivalent resistance of the...
- Q (a) What is the hot resistance of a 28.0 W light bulb with a tungsten filament that runs on 120 V AC?(b) If the bulb's operating temperature is 2700C, what...
- Q You are planning a circuit where you need a resistor with a value of 5.13 Ohms (2) This resistor is made out of silver (see the table in your textbook...
- Q A resistor with an unknown value (R) has 9V applied to it from a battery. The resistor wastes 1.34 W of power as heat.a. What is the current flowing through...
- Q Physics students are debating the proper method for measuring electric current and potential difference in a circuit:Group A: The ammeter measures current and is hooked up in parallel. The voltmeter...
- Q Several unequal resistors are connected in parallel. Which statement is correct about the equivalent resistance?The equivalent resistance depends on the voltage applied across the group.The equivalent resistance is less than...
- Q A length of wire is cut in half and the two lengths are wrapped together side by side to make a thicker wire. How does the resistance of this new...
- Q Two resistors are connected in parallel. If the battery produces 6 A, and one resistor experiences a current of 4 A, then the currentin the second resistor is?
- Q What is another way to determine voltage, current and resistance without using Ohm's Law?l. We can use Coulumbs lawII. Measure the current and multiply it by the voltageIII. You must...
- Q An electric heater is constructed by applying a potential difference of 110 V across a Nichrome wire that has a total resistance of 28.9 ohms. The power rating of the...
- Q An electric heater is constructed by applying a potential difference of 120 V across a the wire Nichrome wire that has a total resistance of 8.00 V. Find the current...
- Q The units used to measure charge, current, potential difference, and resistance are, respectively,d. ampere, joule, volt, ohma. ampere, joule, ohm, voltb. coulomb, ampere, volt, ohmc. coulomb, ampere, ohm, watte. ampere,...
- Q The electrical force between charges is strongest when the charges areSelect one:a. close together.b. The electric force is constant everywhere.c. far apart.
- Q Charged objects interact with one another. One can observe the interactions and infer information about the type of charge present on an object. Complete the following statements with the word...
- Q Formula Based Problem i. Draw a working circuit with one battery and two resistors in parallel. ii. Label the battery as 16V and the two resistors as 12? and 60?....
- Q Two simple circuits are built with two different electrical devices. Each contains the same size battery. One device has a resistance of 100 2 and the other has a resistance...
- Q Below are two sets of batteries and bulbs. In Figure 1, draw where wires must be connected in order for the bulbs to be in parallel. In Figure 2, draw...
- Q Three different circuits are set up involving identical batteries and identical bulbs.Circuit 1 connects just a single bulb to the battery.Circuit 2 connects the two bulbs in series to the...
- Q A high resistance resistor and a lower resistance resistor. Are connected in parallel voltage source. Which resistor has a greater power dissipation?They have the same power dissipation because they are...
- Q Wire 1 is made of a material with resistivity p. The diameter of wire 1 is D, the length is L and the resistance is R. Wire 2 is made...
- Q An aluminum wire has a diameter of 0.102 mm and a length of 52.7 m. The resistivity of aluminum is 2.65 x 10-80-m. a) What is the resistance of the...
- Q You have a long uniform wire with resistance R. You cut it into three equal length pieces. You connect the three pieces side by side. What is the resistance of...
- Q The ends of a wire are connected to the terminals of a battery. For which of the following changes will the resulting current in the circuit have the largest value?...
- Q 14. Two metal rods, A and B, have the same resistance R. Rod B has three times the length and three times the diameter of rod A. Rod A has...
- Q Consider a real battery with an internal resistance of r = 10 02 and an emf of ? = 9V. Thebattery is connected to a load resistance of RL =...
- Q Which quantities are equal to sum of the individual values within a circuit?the current in a parallel circuit and the voltage in a series circuitthe resistance in a parallel circuit...
- Q 15. 0.01 A causes involuntary muscle contractions. The resistance of dry human skin is about 500,000 ohms and wet, sweaty, human skin is about 1000 ohms. How much voltage is...
- Q How long must a 0.50-mm-diameter aluminum wire be to have a 0.46 A current when connected to the terminals of a 1.5 V flashlight battery?Express your answer to two significant...
- Q What is the potential difference across a 16-m-long, 2.0-mm-diameter copper wire carrying an 7.3 A current?Express your answer to two significant figures and include the appropriate units.
- Q When a resistor with resistance R is connected to a 1.50 V flashlightbattery, the resistor consumes 0.0605 W of electrical power.(Throughout, assume that each battery has negligible internalresistance.)Part AWhat power...
- Q A circuit has a current of 3.6 A and a resistance of 5.0 Q. What is thevoltage applied to the circuit?O 0.72 VoltsO 1.4 Volts8.6 VoltsO 18 VoltsFor a constant...
- Q Identify the end terminals and the wiper terminal for the potentiometer below. Number them 1, 2 and 3 with 2 being the wiper.What is the different between fixed- value resistor...
- Q Which statement correctly describes the formation of an electric current?OA resistance causes electric charges to move from lower to higher potential.O A voltage causes electric charges to move from lower...
- Q A. A 12.0 V storage battery is connected to three resistors of 6.75 2,15.3 2, and 21.6 2. The resistors are joined in series.a. Calculate the equivalent resistance of the...
- Q A certain laboratory experiment requires an aluminum wire of length of 39.0 m and a resistance of 4.10 2 at 20.0C. What diameter wire must be used? (The resistivity of...
- Q Imagine that you want to make sure the battery for your string of lights will last as long as possible. A battery will last longer if it powers a circuit...
- Q An electric kettle with an effective resistance of 9.62 when connected to a 120 V wall outlet. How much time will it take for this kettle to convert 310,000 J...
- Q Two batteries of 7 volt and 13 volt and internal resistances 1 ohm and 2 ohm respectively are connected in parallel with a resistance of 12 ohm. Find the current...
- Q All household circuits are wired in parallel. A 1220-W toaster, a 200-W blender, and a 50-W lamp are plugged into the same outlet. (The three devices are in parallel when...
- Q As shown on the left, a charge Q = -8.13 mC which has a mass m = 0.270 kg is traveling with a velocity Vo = 5.61 m/s +x. The...
- Q If all of the dimensions of the block double (to become 20 cm wide, 8 cm tall, and 6 cm deep), what happens to the resistance along each axis?A. The...
- Q Consider the network of four resistors shown in the diagram, where R? = 2.00? , R? = 5.00?, R = 1.00?, and R? =7.00 ?. The resistors are connected to...
- Q A gold wire 6.30 m long and of diameter 0.830 mm carries a current of 1.19 A.Find the resistance of this wire.
- Q A voltage of 56 Vis placed across a resistance of 11.2 Q. What is the current that will be pushed through the circuit?
- Q The heating element of an electric fire has a working temperature of 750C, at which it takes 1 kW when operating from a 250 V supply. When first switched on,...
- Q A tungsten-filament lamp has a temperature of 2050C and a resistance of 500 ohms when taking normal working current. Calculate the resistance of the filament when it has a temperature...
- Q If a metal wire carries a current of 84.0 mA, how long does it take for 12.0x10^20 electrons to pass a given cross-sectional area anywhere along the wire? The fundamental...
- Q Interface Conditions for Permeable Materials. An interface between free space and a perfectly permeable material exists. In free space (1), ? = o [H/m], e o [F/m], and 6-0. In...
- Q If you had the 10 V supply set to its full voltage and set so that the maximum supply current is 5A, use Ohm's law to answer the following question....
- Q Which of the following statements is true about electrical outlets in child care facilities?A. They should have protective covers to prevent children from sticking objects in them.B. They pose no...
- Q Let's take a current-carrying cable with a gradually narrowing cross-sectional area along the length of the wire so thewire turns into the shape of a very long, truncated cone. How...
- Q A computer monitor uses 1.5 A of current when it is plugged into a 120 V outlet. The monitor is never turned off. What is the yearly cost of operating...
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