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
Rudik [331]
3 years ago
11

A resistor R and another resistor 2R are connected in a series across a battery. If heat is produced at a rate of 10W in R, then

in R it is produced at a rate of: A. 40 W
B. 20 W
C. 10 W
D. 5 W
Physics
1 answer:
alekssr [168]3 years ago
5 0

Answer:

Option B

Solution:

As per the question:

Heat produced at the rate of 10 W  

The resistor R and 2R are in series.

Also, in series, same current, I' passes through each element in the circuit.

Therefore, current is constant in series.

Also,

Power,P' = I'^{2}R

When current, I' is constant, then

P' ∝ R

Thus

\frac{P'}{2R} = \frac{10}{R}

P' = 20 W

You might be interested in
In case of collision of objects in two dimensions which statement is true after the collision?
Grace [21]

The correct answer to the question is : C) The horizontal momentum and the vertical momentum are both conserved. 

EXPLANATION :

Before coming into any conclusion, first we have to understand the law of conservation of momentum.

As per the law of conservation of momentum, the total linear as well as angular momentum of an isolated system is always conserved . The law of conservation of energy is a universal fact.

Hence, during any type of collision, the total momentum is always conserved.

Hence, the total horizontal momentum as well as total vertical momentum are always conserved during both elastic as well as inelastic collision.



5 0
3 years ago
Read 2 more answers
How is energy measured?​
stepladder [879]

Because a Btu is so small, energy is usually measured in millions of Btus. 1 Btu = the amount of energy required to increase the temperature of one pound of water (which is equivalent to one pint) by one degree Fahrenheit. This is roughly the heat produced from burning one match.

<em>https://www.ucsusa.org/clean_energy/our-energy-choices/how-is-energy-measured.html</em>

5 0
3 years ago
A 115-turn circular coil of radius 2.71 cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coi
tester [92]

Answer:

80.6 mV

Explanation:

Parameters given:

Number of turns, N = 115

Radius of coil, r = 2.71 cm = 0.0271m

Time taken, t = 0.133s

Initial magnetic field, Bin = 50.1 mT = 0.0501 T

Final magnetic field, Bfin = 90.5 mT = 0.0905 T

Induces EMF is given as:

EMF = [(Bfin - Bin) * N * A] / t

EMF = [(0.0905 - 0.0501) * 115 * pi * 0.0271²] / 0.133

EMF = (0.0404 * 115 * 3.142 * 0.0007344) / 0.133

EMF = 0.0806 V = 80.6 mV

3 0
3 years ago
What is the speed of the sound wave if the frequency is 70 hertz and the wavelength is 0.4 meters
sesenic [268]

28 mps miles per second

8 0
4 years ago
Doubling an object’s height will have what effect on its potential energy due to gravity?
timurjin [86]
Potential energy due to gravity = Ep = mgh [symbols have their usual meaning ]
Evidently, HALVING the mass will make Ep , HALF its previous value. So, It will be halved.
5 0
3 years ago
Read 2 more answers
Other questions:
  • To maintain a constant speed, the force provided by a car's engine must equal the drag force plus the force of friction of the r
    10·1 answer
  • Randomly assigning students to two different groups in an experiment on
    15·2 answers
  • Logow se propong by
    15·1 answer
  • Lymph contains hemocytes, a type of white blood cell.<br> true or false
    6·1 answer
  • A car starts from rest and travels for t1 seconds with a uniform acceleration a1. The driver then applies the brakes, causing a
    11·1 answer
  • Two particles are traveling through space. At time t the first particle is at the point (−1 + t, 4 − t, −1 + 2t) and the second
    6·1 answer
  • Am i pertty and who do think is going to win the presidential election who do u want to win and why
    11·2 answers
  • . Determinar la magnitud de la fuerza que recibe un cuerpo de 45 kg, la cual le produce una aceleración cuya magnitud es de 5 m/
    11·1 answer
  • Explain the function of the “Amygdala” in emotional experience?
    14·1 answer
  • if length of the spring is doubled, what will happen to its time period? if mass of the spring is doubled and spring constant wi
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!