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If a battery has nine volts and three light bulbs with resistances of 10 20 and 30 then what is the voltage across lightbulb?
If the three light bulbs are in parallel across the battery, then the full 9 volts appears
across each light bulb.
If the three light bulbs are in series across the battery, then the voltage divides among
them as follows:
Across the 10-ohm: 9 x (10/60) = 1.5 volts
Across the 20-ohm: 9 x (20/60) = 3 volts
Across the 30-ohm: 9 x (30/60) = 4.5 volts
Sum of the voltages across the 3 individual light bulbs = 1.5 + 3 + 4.5 = 9 volts.
What else can I help you with?
How does the voltage across a parallel plate capacitor change when connected to a battery?
When a parallel plate capacitor is connected to a battery, the voltage across the capacitor increases as it charges. The battery provides a potential difference that causes charges to accumulate on the plates, leading to an increase in voltage until the capacitor is fully charged.
How do you measure the voltageof a lightbulb?
You can measure the voltage of a light bulb by using a multimeter set to the voltage setting. Simply touch the positive and negative probes of the multimeter to the base of the light bulb where it connects to the socket to measure the voltage across the bulb.
What is the total voltage drop across a set of resistors in series?
Simply add all of the component's resistances together and that will give you circuits total resistance. If you're dealing with a 'series-parallel', or 'parallel' circuit, the equations will change, but in a simple series circuit, the total resistance is just the total of all the component's resistance.
What two factors determine the output energy of a battery?
The energy delivered by a battery would depend on-- the battery's voltage-- the resistance of the load connected across its output terminals-- the length of the time the load is connectedThe power delivered by the battery is [ (voltage)2 divided by (load resistance) ].The total energy delivered by the battery is [ (power) multiplied by (time the load is connected) ].
What is the rule for voltage across each resistor?
The rule for voltage across each resistor in a series circuit is that the total voltage supplied by the source is equal to the sum of the voltage drops across each resistor. In a parallel circuit, the voltage across each resistor is the same and equal to the source voltage.
What term remains the same across all the resistances in a parallel combination of resistances?
The voltage across the resistors will remain constant.
Modern electronic multimeter measures resistances by?
forcing a constant current and measuring the voltage across the unknown resistor.
Why is the voltage across a battery in a parallel circuit equal to the voltage across each bulb?
The voltage across a battery in a parallel circuit is equal to the voltage across each bulb because Kirchoff's Voltage Law (KVL) states that the signed sum of the voltages going around a series circuit adds up to zero. Each section of the parallel circuit, i.e. the battery and one bulb, constitutes a series circuit. By KVL, the voltage across the battery must be equal and opposite to the voltage across the bulb. Another way of thinking about this is to consider that the conductors joining the battery and bulbs effectively have zero ohms resistance. By Ohm's law, this means the voltage across the conductor is zero, which means the voltage across the bulb must be equal to the voltage across the battery and, of course, the same applies for all of the bulbs.
A light bulb is wired in series with a 144 resistor and they are connected across a 120 V source The power delivered to the light bulb is 22.2 watts What are the two possible resistances of the light?
There is only one possible answer.Voltage = current * resistancealso, Power = Voltage * Voltage / resistanceIf you follow the algebra, you should get a resulting resistance of the lightbulb to be 548.6 ohms.
If three lamps are connected in series to a 6 volt battery how many volts are impressed across each lamp?
In a parallel circuit, Voltage is constant through out the circuit. Thus, the voltage across each lamp is 6-volts.
When three resistors are connected in series the amount of voltage that is measured across each one is determine by what?
The voltage drop across each resistor is determined by the amounts of resistance in the 3 resistors and all the rest of the resistances in the electrical circuit.
What is voltage how it produce?
Voltage is energy per charge, in joules per coulomb, commonly known as the volt. It is produced by batteries, generators, current sources across resistances, voltage sources, thermocouples, solar cells, etc.
What is a solution of series circuits?
All the volt drops across each component in the series circuit will add up to the emf of the battery or power supply. Note the voltage supplying the circuit and divide it by the sum of all the resistances in the circuit. This gives you the current which is the same through all components. Take a component's resistance and multiply by the current and you have the voltage drop across it.
How does the voltage across a parallel plate capacitor change when connected to a battery?
When a parallel plate capacitor is connected to a battery, the voltage across the capacitor increases as it charges. The battery provides a potential difference that causes charges to accumulate on the plates, leading to an increase in voltage until the capacitor is fully charged.
A battery of emf 2V is connected to an external resistance which is equal to its internal resistance and then find potential difference across the external resistance?
As the source impedance is equal to load impedance, it is assumed that both the resistances are in series. This distributes the whole voltage equally between both the impedance. Hence the PD across external resistance will be 1V.
When a voltmeter is place across a forward biased diode it will read a voltage?
(A) The bias battery voltage (B) 0V (C) the diode barrier potentiaol (D) The total circuit voltage
Two resistors are connected in parallel to a battery What must the votlage across these two resistors?
Both resistors will have the voltage of the battery.
