Which statement describes the relationship of resistance and current?
Resistance is directly proportional to current because R = V over I..
Resistance is inversely proportional to current because R = .
Resistance is directly proportional to current because R = VI.
Resistance is inversely proportional to current because R = VI.
Resistance is inversely proportional to current because R = V/I.
The correct statement is:
Resistance is directly proportional to current because R = V / I.
The correct statement is: Resistance is directly proportional to current because R = V / I.
To understand this relationship, we need to recall Ohm's Law, which states that the current passing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor.
Ohm's Law is expressed as:
V = I * R
where V represents the voltage, I represents the current, and R represents the resistance.
To solve for resistance, we rearrange the equation:
R = V / I
This equation shows that the resistance of a conductor is equal to the voltage across it divided by the current passing through it. Therefore, resistance is directly proportional to current. When current increases, resistance increases proportionally, and when current decreases, resistance decreases proportionally.
So, the correct statement is: Resistance is directly proportional to current because R = V / I.
A hair dryer has a resistance of 11.5 . What current does it conduct when it is plugged into a wall outlet that provides 120 V?
0.10 A
10.4 A
109 A
1380 A
To determine the current (I) flowing through the hair dryer when plugged into the wall outlet, we can use Ohm's Law, which states that current is equal to voltage divided by resistance (I = V/R).
Given:
Resistance (R) = 11.5 Ω
Voltage (V) = 120 V
Plugging in these values to Ohm's Law, we have:
I = 120 V / 11.5 Ω
Calculating this equation, we find:
I ≈ 10.4 A
Therefore, the current flowing through the hair dryer when plugged into a 120 V wall outlet is approximately 10.4 A. Option B, 10.4 A, is the correct answer.
What is the resistance of a light bulb if a potential difference of 120 V will produce a current of 0.5 A in the bulb?
0.0042
0.5
60
240
To find the resistance (R) of a light bulb, we can rearrange Ohm's Law (I = V/R) to solve for resistance:
R = V/I
Given:
Potential difference (V) = 120 V
Current (I) = 0.5 A
Plugging in these values to the equation, we have:
R = 120 V / 0.5 A
Calculating this equation, we find:
R = 240 Ω
Therefore, the resistance of the light bulb is 240 Ω. Option D, 240, is the correct answer.
According to Ohm’s law, which combination of units is the same as the unit for resistance?
volt ÷ ampere
ampere × volt
volt + ampere
ampere ÷ volt
According to Ohm's Law, the unit of resistance is volt divided by ampere. Therefore, the correct combination of units that is the same as the unit for resistance is ampere ÷ volt.
Which symbol and unit of measurement are used for voltage?
symbol: V; unit: A
symbol: R; unit :
symbol: V; unit: V
symbol: R; unit: V
The correct symbol for voltage is V, and the unit of measurement for voltage is also V, which stands for volts. Therefore, the correct option is symbol: V; unit: V.
Jaipal measures a circuit at 1.2 A and 24 . Using Ohm’s law, what can he calculate for the circuit?
current (C)
current (I)
voltage (V)
voltage (A)
Using Ohm's Law, we can determine the voltage (V) of the circuit.
Ohm's Law states that V = I * R, where V represents voltage, I represents current, and R represents resistance.
From the given information:
Current (I) = 1.2 A
Resistance (R) = 24 Ω
Plugging these values into the equation, we have:
V = 1.2 A * 24 Ω
Calculating this equation, we find:
V = 28.8 V
Therefore, Jaipal can calculate the voltage (V) of the circuit to be 28.8 V.
Kaya collects the data shown in the table.
A 2-column table with 3 rows. The first column labeled Quantity has entries Voltage, Current, Resistance. The second column labeled Value has entries 6.0 volts, 0.3 Amperes, empty.
What is the resistance in the circuit?
0.05
1.8
5.7
20
To find the resistance in the circuit, we need to use Ohm's Law, which states that resistance (R) is equal to voltage (V) divided by current (I).
From the given data:
Voltage (V) = 6.0 volts
Current (I) = 0.3 Amperes
Using Ohm's Law, we have:
Resistance (R) = Voltage (V) / Current (I)
Plugging in the given values, we have:
Resistance (R) = 6.0 volts / 0.3 Amperes
Calculating this equation, we find:
Resistance (R) = 20 Ω
Therefore, the resistance in the circuit is 20 Ω. Option D, 20, is the correct answer.
Which symbol and unit of measurement are used for resistance?
symbol: R; unit :
symbol: ; unit: R
symbol: R; unit: O
symbol: R; unit: R
The correct symbol for resistance is R, and the unit of measurement for resistance is ohm, which is represented by the symbol Ω. Therefore, the correct option is symbol: R; unit: Ω.
A light bulb has a resistance of 360 . What is the current in the bulb when it has a potential difference of 120 V across it?
0.33 A
3 A
480 A
43,200 A
To determine the current (I) in the light bulb when it has a potential difference (V) of 120 V across it, we can use Ohm's Law, which states that current is equal to voltage divided by resistance (I = V/R).
Given:
Resistance (R) = 360 Ω
Voltage (V) = 120 V
Plugging in these values to Ohm's Law, we have:
I = 120 V / 360 Ω
Calculating this equation, we find:
I = 0.33 A
Therefore, the current flowing through the light bulb when it has a potential difference of 120 V across it is 0.33 A. Option A, 0.33 A, is the correct answer.
I GOT 60 PERCENT THATS NOT GOOD but anyways i can do a re take
When the resistance in a circuit remains constant, how are the voltage and current related?
The current doubles when the voltage doubles because they are directly proportional.
The current doubles when the voltage doubles because they are inversely proportional.
The current is cut in half when the voltage doubles because they are directly proportional.
The current is cut in half when the voltage doubles because they are inversely proportional.
When the resistance in a circuit remains constant, the voltage and current are directly proportional. Therefore, the correct statement is: The current doubles when the voltage doubles because they are directly proportional.
Which symbol and unit of measurement are used for electric current?
symbol: A; unit: I
symbol: C; unit: A
symbol: I; unit: C
symbol: I; unit: A
The correct symbol for electric current is I, and the unit of measurement for electric current is ampere, which is represented by the symbol A. Therefore, the correct option is symbol: I; unit: A.
Which equation is correct according to Ohm’s law?
The correct equation according to Ohm's Law is:
V = I * R
This equation states that the voltage (V) across a conductor is equal to the product of the current (I) flowing through the conductor and the resistance (R) of the conductor.
To increase the current in a circuit, which can be increased?
voltage
resistance
interference
ohms
To increase the current in a circuit, the voltage can be increased.
According to Ohm's Law (I = V/R), current (I) is directly proportional to voltage (V) when resistance (R) is held constant. By increasing the voltage, the current will increase as well, given that the resistance remains the same.
Thanks it is now 80 percent :3
You're welcome! I'm glad I could help. Congratulations on the improvement to 80 percent! If you have any more questions, feel free to ask. Good luck with your studies!
What is the relationship between resistance and current for a given voltage?
As resistance increases, current increases.
As resistance increases, current decreases.
As resistance increases, current stays the same.