Question
In: Physics
A transformer is intended to decrease the value of the alternating voltage from 500 volts to...
A transformer is intended to decrease the value of the alternating voltage from 500 volts to 25 volts. The primary coil contains 200 turns. Find the necessary number of turns N2 in the secondary coil.
A transformer is intended to decrease the value of the alternating current from 500 amperes to 25 amperes. The primary coil contains 200 turns. Find the necessary number of turns N2 in the secondary coil.
In a transformer, the primary coil contains 400 turns, and the secondary coil contains 80 turns. If the primary current is 2.5 amperes, what is the secondary current I2?
A transformer supplies 60 watts of power to a device that is rated at 20 volts. The primary coil is connected to a 120-volt ac source. What is the current I1 in the primary coil?
The voltage and the current in the primary coil of a nonideal transformer are 120 volts and 2.0 amperes. The voltage and the current in the secondary coil are 19.4 volts and 11.8 amperes. What is the efficiency e of the transformer? The efficiency of a transformer is defined as the ratio of the output power to the input power, expressed as a percentage: e=100Pout/Pin.
Solutions
genius_generous answered 1 year agoRelated Solutions
The voltage in a circuit is 115 volts. A particular technique for measuring the voltage gives...
The voltage in a circuit is 115 volts. A particular technique
for measuring the voltage gives readings which are normally
distributed with mean μ=115 volts and standard deviation 5 volts.
Show that the average of four readings has smaller probability of
differing from the true value by 3 volts than an individual
reading. Hence show that average of several measurement of the same
thing is always more accurate than an individual measurement.
The voltage in a circuit is 115 volts. A particular technique for measuring the voltage gives...
The voltage in a circuit is 115 volts. A particular technique
for measuring the voltage gives readings which are normally
distributed with mean μ=115 volts and standard deviation 5 volts.
Show that the average of four readings has smaller probability of
differing from the true value by 3 volts than an individual
reading. Hence show that average of several measurement of the same
thing is always more accurate than an individual measurement.
Q 1: If the fluorescence signal from a PMT is 0.531 volts, what will the voltage...
Q 1: If the fluorescence signal
from a PMT is 0.531 volts, what will the voltage output be if the
following occurs:
a. the lamp intensity doubles
b. the concentration is reduced by 1/2
c. pathlength is doubled
d. the quantum yield drops from 0.50 to 0.10
e.temperature increases
Q 2: Predict how the fluorescence signal changes if the
following occurs. Explain your answer.
[1] the sample temperature
decreases
[2] the excitation light intensity increases by 25%
An RLC circuit consists of an AC voltage source with a maximum voltage of 122 Volts...
An RLC circuit consists of an AC voltage source with a maximum
voltage of 122 Volts connected in series to a resistor, a
capacitor, and an inductor. At the resonant frequency, the
inductive reactance is 13 Ohms and the total impedance of the
circuit is 23 Ohms. What is the average power produced by the
battery at 2.6 times the resonant frequency in Watts?
An RLC circuit consists of an AC voltage source with a maximum voltage of 135 Volts...
An RLC circuit consists of an AC voltage source with a maximum
voltage of 135 Volts connected in series to a resistor, a
capacitor, and an inductor. At the resonant frequency, the
inductive reactance is 15 Ohms and the total impedance of the
circuit is 24 Ohms. What is the average power produced by the
battery at 2.6 times the resonant frequency in Watts?
a) A continuously alternating voltage will produce what type of ultrasound signal from a piezoelectric transducer?...
a) A continuously alternating voltage will produce what type of
ultrasound signal from a piezoelectric transducer? Give an equation
to describe the output. b) Electrical voltage pulses applied to a
piezoelectric transducer will produce what type of signal? Give an
equation to describe the output. c) The addition of damping
material to a transducer changes what parameters? Which are
advantageous and which are disadvantageous? How are the
disadvantages accounted for? d) What is the limiting factor for
resolution of an...
Explain the purpose of the following: (a) CT (Current transformer), (b) PT/VT (Potential Transformer/Voltage Transformer), (c)...
Explain the purpose of the following: (a) CT (Current
transformer), (b) PT/VT (Potential Transformer/Voltage
Transformer), (c) Relay, (d) Circuit Breaker.
In a LR circuit, R=10Ωand L=2H. If an alternating voltage of 120V and 60Hz is connected in this circuit, then the value current flowing in it will be?
In a LR circuit, R=10Ωand L=2H. If an alternating voltage of 120V and 60Hz is connected in this circuit, then the value current flowing in it will be?
Describe your design for a transformer that steps up voltage from 120 to 1200 V. (Talk...
Describe your design for a transformer that steps up voltage
from 120 to 1200 V. (Talk about the numbers of turns and the
material of the core, specifically.) Will the input and output be
AC or DC electricity (there is only one right answer for this one
unless you get fancy)? Compare the input current to the output
current (hint: the output power in the secondary coils should be
calculated to be the same (actually slightly less, due to
inefficiencies)...
Voltage sags and swells. The power quality of a transformer is measured by the quality of...
Voltage sags and swells. The power quality of a transformer
is measured by the quality of the voltage. Two
causes of poor power quality are “sags” and “swells.” A
sag is an unusual dip and a swell is an unusual increase in
the voltage level of a transformer. The power quality of
transformers built in Turkey was investigated in Electrical
Engineering (Vol. 95, 2013). For a sample of 103
transformers
built for heavy industry, the mean number of sags per...
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