0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Can you charge a 120 volt DC battery pack with 120 volt ac current?
No! and you might have a nasty fire with sulphuric acid spilling everwhere. A battery pack is always DC and it must always be charged with DC. It must also have a device for limiting the charging current, and good chargers also cut the charging current off when the right voltage is reached.
What is the Electrical circuit breaker making and making capacity?
making current is a peak value attain at first cycle when the circuit breaker is close.the making current rating is expressed in "peak" value of the maximum ac current it can safely close on that's why it is always have higher value than breaking current. Making current is limited by the withstand capability of the contacts. Breaking current is based on the ability of the contacts to interrupt the current. If the contacts are not able to interrupt the current when they open, the heat energy in the resulting arc will often destroy the device. the breaking current rating is expressed in RMS value of the current.
Is current is the rate of electrical flow in a circuit and that votage is the opposition of current flow?
'Electricity' is not a quantity; it's the name of a subject area or topic (just like 'chemistry'). So 'current' describes a flow of charge (not 'electricity'), expressed in amperes. 'Voltage' (potential difference) is responsible for 'driving' current, expressed in volts. 'Resistance' is the circuit's opposition to current, expressed in ohms.
How do you measure voltage?
Voltage can be measured using the difference between the potentiel between two ends of wire or by using a volt-meter. You can easily measure volt by volt or multimeter but remember voltage always measure across the components but in parallel
Are resistor heating affected by line frequency?
No. The heating effect is the product of the square of the current and resistance, where the current is a root-mean-square value.A.C. current is always expressed as a root-mean-square (r.m.s.) value, which is equivalent to a d.c. current which produces exactly the same heating effect. Root-mean-square values are affected by the shape of a waveform, but not by its frequency.
Must any rational number terminate?
Not always because any number that can be expressed as a fraction is a rational number as for example 0.666...recurring can be expressed as 2/3 as a fraction
Rate of deceleration are always expressed as?
Rates of deceleration are always expressed as negative numbers.
What is the ratio of electric current and voltage in the closed circuit?
The name given by engineers to the ratio of "electrical potential difference" (expressed in volts) to "rate of current flow" (expressed in amperes) is "resistance" (expressed in ohms).
Do rates always have to be expressed as a quotient Explain how you know?
Yes, they do. Rates are always expressed as "this much of one thing TO that much of another". It is then expressed as a ratio of "this" over "that" (or with a colon instead).
Is temperature expressed on the Celsius scale in calculations using Charles' Law?
No, you must always use the Kelvin scale when doing gas law problems.
Does a current always flow between two objects connected by a path?
No - that would violate Conservation of Energy, since an electrical current has energy! For a current to flow, there must also be a voltage difference.
What gene that is always expressed and will produce a trait?
The gene that is always expressed and will produces a trait is a genetic statistic. This statistic is what is created when the gene is dominant.
What percentage of the total current in a transistor flows through the collector?
The total current in a transistor is the emitter current, which is the sum of the collector current and the base current. The ratio of collector current over base current, in linear mode, is beta-DC, or hFe. However, in order for linear mode to be true, the ratings of the transistor must not be exceeded, and the collector current must not be limited by the circuit. Note also that hFe is temperature dependent, and is expressed in the data sheet as a minimum, not an absolute value - it can vary from transistor to transistor.
What are three units of measurment?
Here are some international units of measurement:Mass is expressed in kilograms.Length and distance is expressed in meters.Time is expressed in seconds.Electrical current is expressed in amperes.Speed is expressed in meters/second.
Can you charge a 120 volt DC battery pack with 120 volt ac current?
No! and you might have a nasty fire with sulphuric acid spilling everwhere. A battery pack is always DC and it must always be charged with DC. It must also have a device for limiting the charging current, and good chargers also cut the charging current off when the right voltage is reached.
What gene is always expressed?
Dominant genes will always be expressed however recessive genes would need to be inherited from both parents
Do all versions of each gene always get expressed in an organism?
No, only dominant traits will be expressed.
