In a string of holiday lights, 50 lights—with a resistance of 13.5 Ω each—are connected in series. (a) If the string oflights is plugged into a 120.0-V outlet, what current flows throughit? (b) Three of the lights burn out and activate their shunt resistors, effectively reducing the resistance of each one to 0.15 Ω. Howmuch current now flows through the entire string of lights?

Q: An experimenter accidentally touches a 240 V dc line. If his skin resistance is 10 000 Ω, what value…

A: Given data :               Voltage (V) = 240 V               Resistance (R) = 10000 Ohm

Q: If an electrical component with a resistance of 35 2 is connected to a 112-V source, how much…

A: Resistance , R = 35 Ω Voltage , V = 112 V To find = Current

Q: A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light…

A: given: Power P =30W voltage V =120v time t =4.1 m

Q: A battery with a 0.100-Ω internal resistance supplies 15.0 W of total power with a 9.00 V terminal…

A:

Q: The resistance of an electric heater is  90 Ω  when connected to 120 V. How much energy does it use…

A:

Q: Two identical resistors of 249 Ohms are configured in parallel and connected to a 12.8V power…

A: Resistance of the resistors R = 249 ohms Voltage of the power supply V = 12.8 V

Q: You touch a defective appliance while standing on the ground, and you feel the tingle of a 2.5-mA…

A:

Q: In the US, the conventional voltage seen in a recepticle (wall outlet) is 120 V. How many amperes is…

A:

Q: When a R = 90 Q resistor is connected across a 12 V battery, a current of 122 mA flows. What is the…

A: The expression for find internal resistance of battery is I=εR+rr=εI-R Substitute values in the…

Q: A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light…

A: P = 30 W V = 120 v t= 4.3 min = 4.3 ×60 = 258 sec  To calculate Q

Q: Two identical resistors of 276 Ohms are configured in parallel and connected to a 13.3V power…

A: Write the resistance of a resistor.   R=276 Ohms   Write the voltage difference between the…

Q: A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light…

A: P = V*I  30 = 120* I  I = 30/ 120  I = 0.25 A

Q: What minimum number of 75-W lightbulbs must be connected in parallel to a single 120-V household…

A: The current through one bulb can be calculated as follows,

Q: A person notices a mild shock if the current along a path through the thumb and index finger exceeds…

A: Given:  current,, i = 80 micro Ampere  resistance of dry skin, R = 4 x 105 ohm  resistance of wet…

Q: only. A cen of emf 1.5 V gives a current of 15 A when connected directly to an ammeter of 0.04 Sa…

A:

Q: When a R = 88.4 Q resistor is connected across a 11.2 V battery, a current of 113.3 mA flows. What…

A: Given  R = 88.4 ohm  V = 11.2 V  I = 113.3 mA  Rint =???

Q: Suppose that each headlight of a car uses 3 A and that the driver accidentally left the headlights…

A:

Q: suppose that each headlight of your car uses a 3 A and that you accidentally left the headlights on.…

A:

Q: During open-heart surgery, a defibrillator can be used to bring a patient out of cardiac arrest.…

A: According to Ohm's law, potential difference(v) = Current (I) × Resistance (R) Here , current = 11.5…

Q: A person notices a mild shock if the current along apath through the thumb and index finger exceeds…

A: Maximum current to avoid the shock = 80 uADry skin resistance = 4×105 ΩWet skin resistance = 2 ×103…

Q: The largest number of 100 W electric light bulbs which can be operated from a 240 V supply fitted…

A: Given100 W electric bulbsVoltage=240 VMaximum possible Current (I)= 13 A

Q: A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light…

A: Given,  Power P = 30 W Voltage V = 120 V  time t = 4.1 min = 4.1 * 60 = 246 sec

Q: A car owner forgets to turn off the headlights of his car while itis parked in his garage. If the…

A: Since there is two 2 headlights the total power is 72W

Q: An ECG monitor must have an time o less than 2.00 x 102 us to be able to variations in voltage over…

A: A capacitor is an electrical component that is used to store the energy. Answer  C max =1 × 10- F

Q: How many joules of energy are necessary to run a washing machine for 30 minutes if it is hooked up…

A: We know,  Power, P= V2/R  Energy dissipated, E = P * t = V2 × t /R  Given,  V = 220 V R = 10ohms t =…

Q: If the emf of the battery is 9.0 V, what is its terminal voltage when the switch is closed if the…

A:

Q: A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light…

A: Let the power is given by P. Let the time is given by t. Let the charge is given by Q. Let the…

Q: What voltage drop will be there across a 1 kw electric heater element whose resistance when hot is…

A: The electric power in terms of voltage and resistance is  P =V2R

Q: urrent will an electric heater draw from a 110-volt lib]ne if the resistance of the heater when

A: Given:- Voltage V = 110 V  The resistance of the heater = 26.7 Ω Find:-  The current of the electric…

Q: Power P0 = I0 ∆V0 is delivered to a resistor of resistance R0.If the resistance is doubled (Rnew =…

A: Given,

Q: An electric space heater has a resistance of 8.10 ohms. How much energy does it use when connected…

A: Given data:  Resistance (R) = 8.10 Ω Voltage (V) = 110 V Time (t) = 30 minutes Required: Energy (E)

Q: How much power, in W, is flowing through a 200 Ohm resistor connected to a 9 V battery?

A: Given that : Resistance ( R ) = 200 Ω Voltage ( V ) = 9 V To Find ,  Power ( P )

Q: Consider the given circuit, if R1 = 17.01 N and V1 = 6.6 V, what is the value of the resistance R2…

A:

Q: How much current will be flowiing through a 40.0 length of copper wire with  a radius 4.0 mm if it…

A:

Q: What minimum number of 75-W lightbulbs must be connected in parallel to a single 120-V household…

A: Power rating of each bulb,  Voltage,  Current,

Q: If an electrical component with a resistance of 62 Ω is connected to a 111-V source, how much…

A:

Q: The three bulbs below have the resistances RA 16 Q, Rg = 17 Q, and Rc 18 Q. If the emf of the…

A: Given data The resistance value is RA = 16 Ω The resistance value is RB = 17 Ω The resistance value…

Q: How much power is dissipated by a 60 W (120 V) lightbulb when operated, using a dimmer switch, at…

A: P1=60 WV1=120 VV2=100 V

Q: Suppose that each headlight of a car uses 3 A and that the driver accidentally left the headlights…

A: Energy stored in battery is given by,  E=VIt Here, V is voltage, I is current and t is time.  Energy…

Q: 25. When a resistance R (ohms) and a capacitance C (farads) are connected in series with an emf E…

A:

Q: Сopy of Given the circuit below. а I2 13 15 ohms 35 ohms od 40 ohms + 12 V T 15 V 17 V g e 25 ohms…

A: Given  The current I1 is I1 = 0.1825 A. The current I2 is I2 = 0.3582 A. The current I3 is I3 =…

Q: Suppose an electrical distribution line has a resistance of 1 ohm and needs to deliver 1 MW…

A:

Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.