A certain light bulb has a tungsten filament with a resistance of 15Ω when at 20 degree celsius and 160Ω when hot. Find the temperature of the filament when it is hot.

Q: If the 0.185 mm diameter tungsten filament in a light bulb is to have a resistance of 0.103 Ω at…

A: Given data:   Diameter (d) = 0.185 mm = 0.185×10-3 m Resistance (R) = 0.103 Ω Resistivity (ρ) =…

Q: If the 0.100-mm diameter tungsten filament in a light bulb is to have a resistance of 0.200 Ω at…

A: The area is,

Q: Find the resistance of an iron rod 2 cm in diameter and weighing 3 kg.

A: Given: Diameter of iron rod is D=2cm=2×10-2 m Mass of iron rod is m=3 kg Resistivity of iron is…

Q: A 100-W lightbulb has a resistance of about 12 ΩΩwhen cold (20 ∘C) and 148 Ω when on (hot).…

A: resistance when hot (R) = 148Ω resistance when cold (R0) = 12Ω Temperature of filament when cold…

Q: Of what material is a wire made, if it is 25.0 m long with a 0.100 mm diameter and has a resistance…

A:

Q: If the 0.100-mm diameter tungsten filament in a light bulb is to have a resistance of 0.200Ω at…

A: Given

Q: A certain lightbulb has a tungsten filament with a resistance of 21.7 2 when at 20.0°C and 144 2…

A:

Q: 17.2 A given copper wire has a resistance of 5.18 Ω at 20.0°C while a tungsten wire of the same…

A:

Q: A solar cell provides an emf of 0.380 V. If the cell supplies a constant current of 18.0 mA for 9.00…

A: A solar cell provides an emf of 0.380 V. If the cell supplies a constant current of 18.0 mA for 9.00…

Q: Find The Resistance At 20 Degrees Celsius Of A Tungsten Lighbulb Filament Of Length 4.0 Cm And…

A:

Q: tungsten filament of a lamp has a cross-sectional area of 5 x 10−9?2 , how long must it be

A: This question is based on resistance.

Q: What is the internal resistance of an automobile battery that has an emf of 12.0 V and a terminal…

A: the output voltage expression is,

Q: A car headlight filament is made of tungsten and has a cold resistance of 0.350 Ω. If the filament…

A: Given L = 4.00 x 10-2m R = 0.350 ohm Resistivity of tungsten ( ρ ) = 5.6 x 10-8ohm.meter

Q: A water heater that is connected across the terminals of a 15.0 V power supply is able to heat 250…

A:

Q: A copper wire has a resistance of 29 mΩ at 25 degrees C, what is the new resistance at 6 degrees C?

A:

Q: A copper wire has a resistance of 0.500 Ω at 20.0 °C, and an iron wire has a resistance of 0.525 Ω…

A: The resistance of the copper wire at 20.0 °C,   The resistance of the iron wire at 20.0 °C,

Q: What is the temperature coefficient of resistance of a piece of wire having a resistance of 11.56 Ω…

A: Let the reference temperature is given by t0 . Let the resistance at the reference temperature is…

Q: A battery has a total charge capacity of 10 800 C. For how long can this battery deliver a current…

A: Data Given:- Charge capacity of the battery is Q=10800 C Current is  i=450 mA ⇒i=450 mA×1 A1000 mA…

Q: A certain lightbulb has a tungsten filament with a resistance of 18.5 N when cold and 136 N when…

A:

Q: A tungsten filament has a resistance of 133 Ω at 1500C. If the temperature coefficient of resistance…

A:

Q: If an aluminum power line has a resistance of 80 at 30°C, what is its resistance when cold air…

A:

Q: What is the resistance of an automobile headlight through which 2.50 A flows when 12.0 V is applied…

A:

Q: If the 0.100-mm diameter tungsten filament in a light bulb is to have a resistance of 0.200 Ω at…

A: Given - Diameter of tungsten filament ,d = 0.100 mm =0.100 x 10-3 m  Resistance of tungsten…

Q: An aluminum wire has resistance of 80 ohms at 30 degree Celsius. And determine its resistance when…

A: Given: Initial Resistance of wire (R0) = 80 ohms. Initial Temperature of wire Ti= 300C Final…

Q: Find the current (in A) when a charge of 1200C flows in 6 seconds. A) 7200 B) 200 C) 100 D) 3600

A: Current is rate of flow of charge.  I=Qt Here, I is current, Q is amount of charge and t is time.

Q: How much would you have to raise the temperature of a copper wire (originally at 20°C) to increase…

A:

Q: What is the internal resistance of an automobile battery that has an emf of 12.0 V and a terminal…

A: Given: Emf of battery, ε=12.0 V Terminal voltage, V=15.0 V Current, I= 4.40 A    To determine…

Q: If the 0.130 mm diameter tungsten filament in a light bulb is to have a resistance of 0.100 Ω at…

A:

Q: A certain lightbulb has a tungsten filament with a resistance of 19.0 Ω when at 20.0°C and 140 Ω…

A: Given  The resistance of tungsten filament when it is hot is R = 140 Ω. The resistance of tungsten…

Q: The four resistances are R1 = 4.9 Ohm, R2 = 7.1 Ohm, R3 = 7.2 Ohm, and R4 = 9.2 Ohm. The power…

A: Given Data Resistance of the four resistors are R1=4.9 Ω, R2=7.1 Ω, R3=7.2 Ω and R4=9.2 Ω Potential…

Q: A 850 ft. conductor with a diameter of 0.08 inches has a resistance of 79.7 Ω @ 20°C. What material…

A:

Q: If the 0.190 mm diameter tungsten filament in a light bulb is to have a resistance of 0.142 N at…

A: Answer Given data  Diameter of tungsten filament D = 0.190 mm So  Radius r = D/2 = 0.190/2 = 0.085…

Q: If the 0.180 mm diameter tungsten filament in a light bulb is to have a resistance of 0.176 Ω at…

A:

Q: An electric heater is constructed by applying a potential difference of 99.6V across a wire with a…

A: Power = V2/R

Q: A certain lightbulb has a tungsten filament with a resistance of 21.7 2 when at 20.0°C and 144 2…

A: Given : resistance of tungsten filament at 20 °C, R20 = 21.7 Ω Resistance of tungsten filament at…

Q: A 100-W lightbulb has a resistance of about 15Ω when cold (25 ̊C) and 140Ω when hot. Estimate the…

A: Given : P = 100 W Ro = 15Ω To = 25°C R = 140Ω α=0.0045/°C.

Q: The resistance of a rod with a length of 3.0cm and diameter of 1.0 cm is 56.0Ω. If this rod is…

A: The resistance of a wire is given by  R =ρLA where, L is the length and A is the area, ρ is the…

Q: a 4.00 meter long aluminum wire at 20 C has a radius of 2.5 x 10^-3 meter. what is the resistance of…

A:

Q: A metal wire has a resistance of 10.0 l at a temperature of 20.0 ° C . If the same wire has a…

A: In the ques it is given that the resistance of wire is 10 Ω at 20°Cand 10.6 Ω at 90°C .

Q: If the 0.135 mm diameter tungsten filament in a light bulb is to have a resistance of 0.126 N at…

A:

Q: A copper wire has a resistance of 0.400 n at 20.0°C, and an iron wire has a resistance of 0.420 n at…

A:

Q: A small bulb is rated at 7.50 W when operated at 125 V. The tungsten filament has a temperature…

A:

Q: A power transmission line is hung from metal towers with glass insulators having a resistance of…

A: Given data: Resistance of glass insulator, R=1.00×109 Ω Voltage, V=200 kV =200,000 V

Q: An electric heater is constructed by applying a potential difference of 121.9V across a wire with a…

A:

Q: If the 0.100-mm-diameter tungsten filament in a light bulb is to have a resistance of 0.200Ω at 20.0…

A: diameter of tungsten (d) = 0.10 mm Radius of the bulb (r) = 0.05 mmResistance of the bulb (R) =…

Q: A galvanometer of resistance 50 2 is connected to a battery of 3V along with a resistance of 2950 N…

A: Given : RG = 50 Ω V = 3 V R = 2950 Ω

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.