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What happens to the cut off voltage if the brightness of the light is increased in a photoelectric cell?
The cutoff voltage depends on the maximum kinetic energy of the emitted electrons. The brighter the light the more photons released. which means more electrons released. each photon will release an electron with the same maximum kinetic energy whether the light is bright or dim. therefor the cutoff voltage remains the same if the brightness is increased
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What is the Relationship Between Voltage And Brightness of the Bulb?
The relationship between voltage and brightness of a bulb is directly proportional. As voltage increases, the brightness of the bulb increases because higher voltage provides more energy for the bulb to emit light. Conversely, decreasing voltage reduces the brightness of the bulb.
What happens to the brightness of light bulbs when more batteries are added Why?
Adding more batteries to a circuit with light bulbs will increase the brightness of the bulbs. This is because the additional batteries will provide more voltage, which allows for a higher current to flow through the circuit. As a result, the bulbs will emit more light due to the increased energy supplied.
What happens to the electric current in a wire as voltage is increased?
As voltage is increased, the electric current in a wire also increases because the relationship between voltage, current, and resistance is described by Ohm's Law (V = IR). If resistance remains constant, a higher voltage will result in a higher current flowing through the wire.
What happens to the voltage as more bulbs are added in series?
The voltage in a series circuit is divided among the bulbs, so as more bulbs are added in series, each bulb receives less voltage. This causes the brightness of each bulb to decrease compared to when fewer bulbs are present.
What do you notic about the brightness of the bulbs in the parallel circuit as you added more bulbs to it?
In a parallel circuit, as more bulbs are added, the overall brightness of the bulbs remains constant. This is because each bulb gets the full voltage of the circuit and operates independently of the other bulbs. The individual brightness of each bulb may decrease slightly due to the increased current draw, but the overall brightness of the circuit remains fairly consistent.
How does the voltage affect the brightness of a volt light?
The brightness of a light bulb is directly proportional to the voltage applied to it. Increasing the voltage increases the brightness of the light bulb, while decreasing the voltage decreases the brightness.
What happens to the brightness of a bulb if the volts are increased?
The electrical potential energy increases as the voltage is increased. It further excites the filament in the bulb more than a lessor voltage would. Using good old ohm's law (Voltage = Current x Resistance), a larger voltage applied to a bulb at the same resistance increases the current proportionally and larger currents has the effect to cause higher temps in conductors
What is the Relationship Between Voltage And Brightness of the Bulb?
The relationship between voltage and brightness of a bulb is directly proportional. As voltage increases, the brightness of the bulb increases because higher voltage provides more energy for the bulb to emit light. Conversely, decreasing voltage reduces the brightness of the bulb.
If voltage is increased in a circuit what happens to current series and parallel respectively?
In this case current flows from a high voltage to a lower voltage in a circuit.
How are light bulbs efficiency increased?
The brightness of a standard bulb is directly proportional to the amount of voltage drop across the bulb itself. Thus, to increase the brightness :-Pass more current across the bulb by reducing the resistance of the circuitIncrease the voltage across the bulb, or the circuit. Change the supply.
How do you increase the brightness of a blub in a simple circuit?
Brightness can increased by increasing current flowing through the bulb, but current can be increased only indirectly, by 1. Increasing the Voltage across the bulb 2. Reducing the Resistance of the bulb. Brightness is proportional to Heat energy used/produced, which is = I*I*R*T I= Current R=Resistance T= Time
What happens to the brightness of light bulbs when more batteries are added Why?
Adding more batteries to a circuit with light bulbs will increase the brightness of the bulbs. This is because the additional batteries will provide more voltage, which allows for a higher current to flow through the circuit. As a result, the bulbs will emit more light due to the increased energy supplied.
What would affect the brightness of a lamp?
Voltage applied (voltage at source, resistance of wire and conections etc), ground resistance, designed brightness of element in comparison to the applied voltage
What happens to the current in the circuit if the resistance is increased?
If resistance is increased, current decreases. Ohm's Law: current equals voltage divided by resistance.
What would happen to the brightness of the bulb if you added a second bulb in with the first?
The brightness of a bulb would not change if you added a second bulb in parallel with the first.Unless, of course, the increased current exceeded the power supply's capacity causing a reduction in voltage.
How do you alter the brightness of a bulb?
You alter the brightness of a bulb by changing the voltage or frequency that is applied to the bulb.
How do you change the brightness of the bulb?
Increase the voltage supply.
