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How much power will be produced by 110Volts across a resistive load of 17 ohms?
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Why do you think as the voltage across a lamp changes the power consumption?
Because the power of a resistive component is directly proportional to the square of the voltage across that component.
The power factor of a purely resistive circuit will be?
The power factor of a purely resistive circuit is 1.0.
Is a wattmeter required to measure the active power delivered to a resistive load?
No. If the load is truly resistive, just measure the voltage across the load (in volts)and the current flowing in it (in amps) and multiply them. eg: 115 volts at 1.5 amps = 172.5 watts.
What is the nature of power factor and its variation with firing angle when a single phase voltage controller feeds a resistive load?
With a pure resistive load the Power Factor should be 1.
What is the approximative power factor of an incandescent lamp?
Incandescent lamps are nearly pure resistive loads with a power factor of 1
Why do you think as the voltage across a lamp changes the power consumption?
Because the power of a resistive component is directly proportional to the square of the voltage across that component.
A bulb has power 40W and it is operated 110Volts. what is the energy produced in one second?
A 40 Watt bulb emits 40 Joules each second. ( the operating voltage is irrelevant )
How do you convert 110volts to kVA?
You must know the current or resistance to convert voltage to power.
The power factor of a purely resistive circuit will be?
The power factor of a purely resistive circuit is 1.0.
How many watts make 8amps of 110volts?
Power = E I = (110) x (8) = 880 watts
In a circuit with resistive and inductive load what happens to the power factor as the resistive load increases?
The PF will increase
Which relationship is true of power factor?
Power factor is:the ratio of true power to apparent powerthe ratio of resistance to impedancethe ratio of the voltage across a circuit's resistive component to the supply voltagethe cosine of the phase angleetc.
Is a wattmeter required to measure the active power delivered to a resistive load?
No. If the load is truly resistive, just measure the voltage across the load (in volts)and the current flowing in it (in amps) and multiply them. eg: 115 volts at 1.5 amps = 172.5 watts.
Power factor for pure resistive circuit?
ratio between true power and apparent power is called the power factor for a circuit Power factor =true power/apparent power also we conclude PF=power dissipated / actual power in pure resistive circuit if total resistance is made zero power factor will be zero
What is the nature of power factor and its variation with firing angle when a single phase voltage controller feeds a resistive load?
With a pure resistive load the Power Factor should be 1.
How much power is consumed by a load drawing 5a with 120v across it?
real P= V * I *cos(phase angle between V and I)for purely resistive loads or DC voltages this equals real power P=V*I = 120*5= 600Wattsfor not pure resistive loads you'd have to measure the phase angle between Voltage and Current to get real power.However, at home, the utility company charges for Complex power = V*I.So you'd still pay for V*I.
When is a transformer closet to unity power factor?
When it supplies a resistive load.
