Question
A combination of elements is enclosed in a black box and the voltage and currents are measured across this black box The expression for applied voltage; and the current flowing in it is 
were 
rad/sec Then the wrong statement is:
- There must be a capacitor is the black box
- Power factor of circuit = 0.707
- There must be a resistor in the box
- There must be an inductor in the box
The correct answer is: There must be an inductor in the box
Related Questions to study
A current source sends a current 
When connected across an unknown load gives a voltage output of,
across that load Then voltage across the current source may be brought in phase with the current through it by:
A current source sends a current When connected across an unknown load gives a voltage output of, across that load Then voltage across the current source may be brought in phase with the current through it by:
In the circuit, as shown in the figure, if the value of R.M.S current is 2.2 ampere, the power factor of the box is
In the circuit, as shown in the figure, if the value of R.M.S current is 2.2 ampere, the power factor of the box is
A generator with an adjustable frequency of oscillation is connected to resistance, R =100 
, inductances, L1 =1.7 MH and L2 = 2.3 MH and capacitances 
and 
The resonant angular frequency of the circuit is
A generator with an adjustable frequency of oscillation is connected to resistance, R =100 , inductances, L1 =1.7 MH and L2 = 2.3 MH and capacitances and The resonant angular frequency of the circuit is
A constant voltage at different frequencies is applied across a capacitance C as shown in the figure Which of the following graphs 
Correctly depicts the variation of current with frequency.
A constant voltage at different frequencies is applied across a capacitance C as shown in the figure Which of the following graphs
Correctly depicts the variation of current with frequency.
The voltage across a pure inductor is represented by the following diagram Which one of the following diagrams will represent the current
The voltage across a pure inductor is represented by the following diagram Which one of the following diagrams will represent the current
The current ‘i’ in an inductance coil varies with time ‘t’ according to following graph 
Which one of the following figures shows the variations of voltage in the coil?
The current ‘i’ in an inductance coil varies with time ‘t’ according to following graph
Which one of the following figures shows the variations of voltage in the coil?
The ag e of articles of org aniconic in can be estimated by radiocarbon dating. The radio-isotope carbon-14 is produced continuously in the upper atmosphere as the nitrogen atoms capture
cosmic ray neutrons.
The 14 C atoms react with oxygen molecules to form 14CO2, 14CO2 is absorbed by the plants in photosynthesis. Carbon-14 decays with a half Life OF 5730 years.
After death, the plant no Longer carries out photosynthesis, so it no Longer takes-up 14 CO2 Other org anisms that consume plants for food stop doing so at-death. The emission from 14 C in dead tissue then decreases with the passage of time. The activity per g ram of carbon is a measure of the Length of time elapsed since death. The carbon-14 technique is useful only for dating objects for a Limited period of time.
In carbon dating:
The ag e of articles of org aniconic in can be estimated by radiocarbon dating. The radio-isotope carbon-14 is produced continuously in the upper atmosphere as the nitrogen atoms capture
cosmic ray neutrons.
The 14 C atoms react with oxygen molecules to form 14CO2, 14CO2 is absorbed by the plants in photosynthesis. Carbon-14 decays with a half Life OF 5730 years.
After death, the plant no Longer carries out photosynthesis, so it no Longer takes-up 14 CO2 Other org anisms that consume plants for food stop doing so at-death. The emission from 14 C in dead tissue then decreases with the passage of time. The activity per g ram of carbon is a measure of the Length of time elapsed since death. The carbon-14 technique is useful only for dating objects for a Limited period of time.
In carbon dating:
The age of articles of org aniconic in can be estimated by radiocarbon dating. The radio-isotope carbon-14 is produced continuously in the upper atmosphere as the nitrogen atoms capture
cosmic ray neutrons.
The 14 C atoms react with oxygen molecules to form 14CO2, 14CO2 is absorbed by the plants in photosynthesis. Carbon-14 decays with a half Life OF 5730 years.
After death, the plant no Longer carries out photosynthesis, so it no Longer takes-up 14CO2 Other org anises that consume plants for food stop doing so at-death. The emission from 14C in dead tissue then decreases with the passage of time. The activity per gram of carbon is a measure of the Length of time elapsed since death. The carbon-14 technique is useful only for dating objects for a Limited period Of time.
A piece of wood taken from a cave d welling in New Mexico is found to have a carbon-14 activity (per g ram of carbon) only 0.636 times that of wood cut today. Estimate the ag e of the wood
The age of articles of org aniconic in can be estimated by radiocarbon dating. The radio-isotope carbon-14 is produced continuously in the upper atmosphere as the nitrogen atoms capture
cosmic ray neutrons.
The 14 C atoms react with oxygen molecules to form 14CO2, 14CO2 is absorbed by the plants in photosynthesis. Carbon-14 decays with a half Life OF 5730 years.
After death, the plant no Longer carries out photosynthesis, so it no Longer takes-up 14CO2 Other org anises that consume plants for food stop doing so at-death. The emission from 14C in dead tissue then decreases with the passage of time. The activity per gram of carbon is a measure of the Length of time elapsed since death. The carbon-14 technique is useful only for dating objects for a Limited period Of time.
A piece of wood taken from a cave d welling in New Mexico is found to have a carbon-14 activity (per g ram of carbon) only 0.636 times that of wood cut today. Estimate the ag e of the wood
The age of articles of org aniconic in can be estimated by radiocarbon dating. The radio-isotope carbon-14 is produced continuously in the upper atmosphere as the nitrogen atoms capture
cosmic ray neutrons.
The 14 C atoms react with oxygen molecules to form 14CO2, 14CO2 is absorbed by the plants in photosynthesis. Carbon-14 decays with a half Life Of 5730 years.
After death, the plant no Longer carries out photosynthesis, so it no Long er takes-up 14CO2 Other org anises that consume plants for food stop doing so at-death. The emission from 14C in dead tissue then decreases with the passage of time. The activity per g ram of carbon is a measure of the Length of time elapsed since death. The carbon-14 technique is useful only for dating objects for a Limited period of time.
Which one is correct?
The age of articles of org aniconic in can be estimated by radiocarbon dating. The radio-isotope carbon-14 is produced continuously in the upper atmosphere as the nitrogen atoms capture
cosmic ray neutrons.
The 14 C atoms react with oxygen molecules to form 14CO2, 14CO2 is absorbed by the plants in photosynthesis. Carbon-14 decays with a half Life Of 5730 years.
After death, the plant no Longer carries out photosynthesis, so it no Long er takes-up 14CO2 Other org anises that consume plants for food stop doing so at-death. The emission from 14C in dead tissue then decreases with the passage of time. The activity per g ram of carbon is a measure of the Length of time elapsed since death. The carbon-14 technique is useful only for dating objects for a Limited period of time.
Which one is correct?
C is Lowered from 74:66 mm to 74.01mm Molecular formula of solute may be:
