Physics, 04.10.2019 19:00 matty198

Acamcorder has a power rating of 12 watts. if the output voltage from its battery is 3 volts, what current does it use?

the current in a hair dryer measures 13 amps. the resistance of the hair dryer is 9 ohms. what is the voltage?

which of the following statements about ohm’s law is true?
a. to increase the current, decrease the resistance.
b. ohm’s law relates power, current and resistance.
c. increasing the voltage decreases current if resistance stays the same.
d. keeping the same voltage and decreasing resistance decreases the current.

a 1.5m wire carries a 7 a current when a potential difference of 53 v is applied. what is the resistance of the wire?

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Answer from: sarahholt517

Explanation:

The expression for power in terms of voltage and current is as follows;

P=VI

Here, P is the power, V is the voltage and I is the current.

It is given in the problem that a camcorder has a power rating of 12 watts. The output voltage from its battery is 3 volts.

Calculate the current.

$I= \frac{P}{V}$

Put P= 12 W and V= 3 V.

$I= \frac{12}{3}$

I= 4 A

Therefore, the value of current is 4 A.

The expression for the Ohm's law is as follows;

V=IR .......... (1)

Here, V is the voltage, I is the current and R is the resistance.

It is given in the problem that

The current in a hair dryer measures 13 amps. The resistance of the hair dryer is 9 ohms.

Calculate the voltage.

Put R= 9 ohms and I= 13 A.

V= (13)(9)

V= 117 V

Therefore, the value of the voltage is 117 V.

Ohm's law states that the potential difference is directly proportional to the current flowing across the conductor at given temperature. The current is inversely proportional to the resistance. To increase the current, decrease the resistance.

From the given option, the option (A) is correct.

It is given in the problem that a 1.5 m wire carries a 7 A current when a potential difference of 53 V is applied.

Calculate the resistance by using equation (1).

$R= \frac{V}{I}$

Put V= 53 V and I= 7 A.

$R= \frac{53}{7}$

R= 7.57 ohm

Therefore, the value of the resistance is 7.57 ohms.

Answer from: Quest

Acetic acid /əˈsiːtɪk/, systematically named ethanoic acid /ˌɛθəˈnoʊɪk/, is a colourless liquid organic compound with the chemical formula ch3cooh (also written as ch3co2h or c2h4o2). when undiluted, it is sometimes called glacial acetic acid. vinegar is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water. acetic acid has a distinctive sour taste and pungent smell. in addition to household vinegar, it is mainly produced as a precursor to polyvinyl acetate and cellulose acetate. it is classified as a weak acid since it only partially dissociates in solution, but concentrated acetic acid is corrosive and can attack the skin.acetic acidnamespreferred iupac nameacetic acidsystematic iupac nameethanoic acidother namesvinegar (when dilute); hydrogen acetate; methanecarboxylic acid[1][2]identifierscas number64-19-7 3d model (jsmol)interactive image3dmetb00009 reference506007chebichebi: 15366 chemblchembl539 chemspider171 drugbankdb03166 echa infocard100.000.528ec number200-580-7e numbere260 (preservatives)gmelin reference1380iuphar/bps1058keggd00010 meshacetic+acidpubchem cid176rtecs numberaf1225000uniiq40q9n063p un number2789inchiinchi=1s/c2h4o2/c1-2(3)4/h1h3,(h,3,4) key: qtbsbxvteameqo-uhfffaoysa-n smilescc(o)=o

Answer from: Quest

The answer is c hope this

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Acamcorder has a power rating of 12 watts. if the output voltage from its battery is 3 volts, what c...

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