1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lemur [1.5K]
3 years ago
14

If you double the voltage in a circuit and reduce the resistance by a factor of four what will happen to the current? A) it will

double B) it will decrease by a factor of 2 C) it will increase by a factor of 8 D) it will decrease by a factor of 8
Physics
1 answer:
KatRina [158]3 years ago
5 0
By Ohm's Law, we can relate current, voltage and resistance. It is expressed as V=IR. That is, there is a direct relationship between voltage and resistance and voltage and current.

V = IR
V1/2V1 = I1R1 / I2R1/4
1/2 = 4I1/I2
I2 = 8I1

Therefore, <span> it will increase by a factor of 8. Hope this answers the question.</span>
You might be interested in
A boy is whirling a stone around his head by means of a string. The string makes one complete revolution every second; and the m
Damm [24]

Answer

given,                                                

Tension of string is F                                                  

velocity is increased and the radius is not changed.      

the string makes two complete revolutions every second

consider the centrifugal force acting on the stone          

  = \dfrac{mv^2}{r}                          

now centrifugal force is balanced by tension

T =\dfrac{mv^2}{r}                                

From the above expression we can clearly see that tension is directly proportional to velocity and inversely proportional to radius.

When radius is not changing velocity is increasing means tension will also increase in the string.

8 0
3 years ago
Which poison was used in the Jonestown massacre?
olga nikolaevna [1]
That would be Cyanide. 

Hope this helps! (:
3 0
3 years ago
Read 2 more answers
If 100 J of electrical energy enter the bulb and 5 J of light energy leave the bulb, how many joules of heat energy leave the bu
Novay_Z [31]

As per energy conservation we know that

Energy enter into the bulb = Light energy + Thermal energy

so now we have

energy enter into the bulb = 100 J

Light energy = 5 J

now from above equation we have

100 = 5 + heat

Heat = (100 - 5) J

Heat = 95 J


6 0
3 years ago
A testing instrument that's used to measure electrical signals in a circuit and display them as waveforms on a screen is called
disa [49]
A testing instrument that's used to measure electrical signals
in a circuit and display them as waveforms on a screen is called
an oscilloscope.

8 0
3 years ago
In a cup game if the teams have the same score at the end of the match, 30 minutes of ------- are played.
Alina [70]

Answer:

second lag

Explanation:

If in a cup game, a specified time limit is assigned to both teams to score high. If both teams are unable to score or if score of both the teams is equal then there is another second lag played where each team tries to score high. Even if in second lag both teams fail to score higher than other the last third lag is played or else game is declared draw.

5 0
3 years ago
Other questions:
  • A certain material has a high melting point and is malleable and shiny. It is most likely a _____.
    6·2 answers
  • Scientists can use spectral analysis of stars to determine which of the following?
    6·2 answers
  • Which terrestrial planet experiences the shortest year?
    15·1 answer
  • A weatherman carried an aneroid barometer from the ground floor to his office atop the Sears Tower in Chicago. On the level grou
    10·1 answer
  • A wire of resistance 5.9 Ω is connected to a battery whose emf ε is 4.0 V and whose internal resistance is 1.2 Ω. In 2.9 min, ho
    9·1 answer
  • 1. a) What is the weight of a 20.0 kg girl on earth?
    15·1 answer
  • What would happen happen if a car crashes​
    14·1 answer
  • Need help asapppp
    6·2 answers
  • Helppppppppppopppppppp​
    8·2 answers
  • A 200 N object is resting on a surface with a coefficient of static friction equal to 0.15. A person pushes horizontally with a
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!