What current (in A) flows through the bulb of a 2.80 V flashlight when its hot resistance is 3.45 Ω? A
V(potential differnce)=I(current)•R(resistance)
2.80V=(I)(3.45)
I=2.80/3.45
Therfore current is 0.81A
What current (in A) flows through the bulb of a 2.80 V flashlight when its hot...
What current (in A) flows through the bulb of a 3.20 V flashlight when its hot resistance is 3.75 Ω?
What current flows through the bulb of a 3.00 V flashlight when it’s hot resistance is 3.60 ohms?
What power is dissipated by the bulb of a flashlight when its hot resistance is 2.200E + O and voltage is 9.700E + 0-V? Answer to 3SigFigs with units. .227*A
The hot resistance of a flashlight bulb is 1.80 12, and it is run by a 1.48-V alkaline cell having a 0.100-12 internal resistance. (a) What current flows? x Enter a number. tal resistance of the circuit? Did you consider using Ohm's law? A (b) Calculate the power supplied to the bulb. W
The resistances of most substances increase when they are heated. A bulb for a flashlight using 3.0 V has a resistance of 2.0 ohms when cold and 24 ohms when hot. Calculate the current (Amps) through the bulb when (a) cold and (b) hot. Claculate the power consumed when (c) cold and (d) hot.
A common flashlight bulb is rated at 0.300 A and 2.90 V (the values of the current and voltage under operating conditions). If the resistance of the bulb filament at room temperature (20°C) is 1.10 Ω, what is the temperature of the filament, in degrees Celcius (degC), when the bulb is on? The filament is made of tungsten.
A common flashlight bulb is rated at 0.300 A and 2.70 V (the values of the current and voltage under operating conditions). If the resistance of the tungsten bulb filament at room temperature (20°C) is 2.20 Ω, what is the temperature of the filament when the bulb is on? My answers of 706.86 C is incorrect 9 = 2.2 *(1 + 0.0045(T- 20))
A flashlight bulb carries a current of 0.17A for 78s . How much charge flows through the bulb in this time? How many electrons?
Chapter 26, Problem 021 A common flashlight bulb is rated at 0.23 A and 4.0 V (the values of the current and voltage under operating conditions). If the resistance of the bulb filament at room temperature (20°C) is 0.98 Ω, what is the temperature of the filament when the bulb is on? The temperature coefficient of resistivity is 4.4 × 10-3 K-1 for the filament material.
A typical small flashlight contains two batteries, each having an emf of 1.50 V connected in series with a bulb having a resistance of 18 Ω . A. If the internal resistance of the batteries is negligible, what power is delivered to the bulb? P = B. If the batteries last for a time of 4.1 h , what is the total energy delivered to the bulb? W = C. The resistance of real batteries increases as they run down....