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What will happen if the armature rheostat is zero and field circuit resistance is kept high in a dc motor?
If the armature rheostat is set to zero and the field circuit resistance is kept high in a DC motor, the armature will receive maximum current, leading to a high armature current. However, with a high field circuit resistance, the field current will be low, resulting in a weak magnetic field. This imbalance can cause the motor to run at a very high speed, potentially leading to instability or damage due to excessive armature current and insufficient torque production. Overall, the motor may operate inefficiently and could risk mechanical failure.
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What happen to voltage and current when rheostat is adjusted from maximum to minimum resistance using both ammeter and voltmeter?
When a rheostat is adjusted from maximum to minimum resistance, the overall resistance in the circuit decreases. As a result, the current flowing through the circuit increases, which can be observed on the ammeter as a higher reading. Conversely, the voltage across the rheostat will decrease, as the voltage drop across a lower resistance is less, which can be monitored using the voltmeter.
What will happen to the resistance and the brightness if you add a light bulb to the circuit?
If a rheostat is connected in parallel with a light bulb, the setting of the rheostat should have no effect on the performance of the light bulb, as long as the power supply is able to maintain its output voltage and deliver the current demanded by their parallel combination.
What happen to the circuit if there is higher resistance?
In what sense.
When the thermistor in the circuit is heated the lamp becomes brighter why does this happen?
When the thermistor in the circuit is heated, its resistance decreases due to the negative temperature coefficient of thermistors. This reduction in resistance allows more current to flow through the circuit. As a result, the increased current causes the lamp to receive more power, leading to a brighter illumination.
What would happen if the resistance in a circuit remained the same and the voltage decreased?
A well designed circuit should be able to operate over a range of voltages, not just at one voltage. Especially a circuit which is intended to be powered by a battery. As the battery starts to get used up, and the voltage drops, you want the circuit to operate as planned.
What happen to voltage and current when rheostat is adjusted from maximum to minimum resistance using both ammeter and voltmeter?
When a rheostat is adjusted from maximum to minimum resistance, the overall resistance in the circuit decreases. As a result, the current flowing through the circuit increases, which can be observed on the ammeter as a higher reading. Conversely, the voltage across the rheostat will decrease, as the voltage drop across a lower resistance is less, which can be monitored using the voltmeter.
What will happen if field rheostat of dc shunt motor is kept at maximum position while starting?
First remember this rheostat is connected in series with the armature to increase the total resistance to limit the starting current, thus achieving max starting torque from the motor
What would happen to circuit if there was no resistance?
a circuit with no resistance or zero resistance can be considered as open circuit in which the current is zero. without resistance the circuit just becomes open ()
What will happen to the resistance and the brightness if you add a light bulb to the circuit?
If a rheostat is connected in parallel with a light bulb, the setting of the rheostat should have no effect on the performance of the light bulb, as long as the power supply is able to maintain its output voltage and deliver the current demanded by their parallel combination.
What happen to the circuit if there is higher resistance?
In what sense.
What will happen in a circuit if the voltage does not change but the resistance in the circuit increases?
If the resistance increases, while the voltage stays the same, current will decrease. Current = voltage divided by resistance
What is the roll of bleeder resistance in LC filter circuit and what will happen if the bleeder resistor is not used in circuit?
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What is the resistance when switch is open?
Nothing will happen to the resistance of the circuit. However, with the switch open, it will be 'seen' as having infinite resistance from the supply side.
What happen to the current in a 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 current in a simple circuit if a bulb with a higher resistance were used?
If a bulb with higher resistance is used in a simple circuit, the total resistance in the circuit would increase. According to Ohm's Law (V=IR), with an increase in resistance, the current in the circuit would decrease since the voltage supplied remains constant.
What will happen to a buzzer connected to a circuit?
If it is connected in series with a circuit then it might raise the resistance too high and fail the system. Parallel connection is a circuit is probably the best bet you have.
What will happen if a voltmeter has a low shunt resistance instead of having high shunt resistance?
The purpose of a voltmeter is to indicate the potential difference between two points in a circuit.When a voltmeter is connected across a circuit, it shunts the circuit. If the voltmeter has a low resistance,it will draw a substantial amount of current. This action lowers the effective resistance of the circuit andchanges the voltage reading.
