The label on a battery-powered radio recommends the use of a rechargeable nickel-cadmium cell (nicads), although it has a 1.25-V emf, whereas an alkaline cell has a 1.58-V emf. The radio has a 3.20 Ω resistance.(a) Draw a circuit diagram of the radio and its battery. Now, calculate the power delivered to the radio (b) when using a nicad cells, each having an internal resistance of 0.0400 Ω , and (c) when using an alkaline cell, having an internal resistance of 0.200 Ω . (d) Does this differenceseem significant, considering that the radio's effective resistance is lowered when its volume is aimed up?
The label on a battery-powered radio recommends the use of a rechargeable nickel-cadmium cell (nicads), although it has a 1.25-V emf, whereas an alkaline cell has a 1.58-V emf. The radio has a 3.20 Ω resistance.(a) Draw a circuit diagram of the radio and its battery. Now, calculate the power delivered to the radio (b) when using a nicad cells, each having an internal resistance of 0.0400 Ω , and (c) when using an alkaline cell, having an internal resistance of 0.200 Ω . (d) Does this differenceseem significant, considering that the radio's effective resistance is lowered when its volume is aimed up?
The label on a battery-powered radio recommends the use of a rechargeable nickel-cadmium cell (nicads), although it has a 1.25-V emf, whereas an alkaline cell has a 1.58-V emf. The radio has a 3.20
Ω
resistance.(a) Draw a circuit diagram of the radio and its battery. Now, calculate the power delivered to the radio (b) when using a nicad cells, each having an internal resistance of 0.0400
Ω
, and (c) when using an alkaline cell, having an internal resistance of 0.200
Ω
. (d) Does this differenceseem significant, considering that the radio's effective resistance is lowered when its volume is aimed up?
The label on a battery-powered radio recommends the use of a rechargeable nickel-cadmium cell (nicads), although it has a 1.25-V emf, whereas an alkaline cell has a 1.58-V emf. The radio has a 3.20 Ω resistance. (a) Draw a circuit diagram of the radio and its battery. Now, calculate the power delivered to the radio (b) when using a nicad cells, each having an internal resistance of 0.0400 Ω , and (c) when using an alkaline cell, having an internal resistance of 0.200 Ω . (d) Does this difference seem significant, considering that the radio’s effective resistance is lowered when its volume is turned up?
The figure shows an LED, protected by a resistor R, which is powered by a 9 Volt battery. If the power of the LED is 70 milliwatts and the voltage drop across the LED is 3.5 volts, determine the value of the resistor R in ohms that should be used in the circuit.
The label on a portable radio recommends the use of rechargeable nickel-cadmium cells (NiCads), although they have a 1.25 V emf while alkaline cells have a 1.58 V emf. The radio has a 3.50 Ω resistance.
Calculate the power delivered to the radio (in W) when using NiCad cells each having an internal resistance of 0.0380 Ω.
Calculate the power delivered to the radio (in W) when using alkaline cells each having an internal resistance of 0.210 Ω.
Does this difference seem significant, considering that the radio's effective resistance is lowered when its volume is turned up?
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