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
tankabanditka [31]
3 years ago
7

You have two resistors with the same cross sectional area and resistivity. Resistor A has length L1 and resistor B has length L2

. Assume L2 > L1. If the resistors are connected in series with a battery, which resistor has the most power delivered to it? Explain. b: If they are connected in parallel with a battery, which resistor has the most power delivered to it? Explain.
Physics
1 answer:
oee [108]3 years ago
8 0

Answer:

Explanation:

Given

Resistor A has length L_1

and Resistor B has Length L_2

and Resistance is given by

R=\frac{\rho L}{A}

Considering \rhoand A to be constant thus

R_2>R_1 because L_2>L_1

(a)When they are connected in series

As the current in series is same and power is i^2R

therefore P_2>P_1 as R is greater for second resistor

(b)if they are connected in Parallel

In Parallel connection Voltage is same

P=\frac{V^2}{R}

resistance of 2 is greater than 1 thus Power delivered by 1 is greater than 2

You might be interested in
The figure above represents a stick of uniform density that is attached to a pivot at the right end and has equally spaced marks
zavuch27 [327]

Answer:

After 2.0s the  angular momentum is L= 2(4A+3B+2C+D)x

Explanation:

Let us call forces acting on the rod, A, B, C, and D, and the separation between them x .

Then, the  torque due to force A is

\tau_a = 4Ax,

due to the force B

\tau_b = 3Bx,

due to force C

\tau_c = 2Cx,

and the torque due to force D is

\tau_d = Dx.

Therefore, the total torque on the the stick is

\tau_{tot} =\tau_a+\tau_b+\tau_c+\tau_d

\tau_{tot} =4Ax+3Bx+2Cx+Dx

\tau_{tot} =x(4A+3B+2C+D)

Now, this torque causes angular acceleration \alpha according to the equation

I \alpha = \tau_{tot}

where I is moment of inertia of the stick and it has the value

I = \dfrac{1}{3} m(4x)^2

Therefore the angular acceleration is

\alpha = \dfrac{\tau_{tot} }{I}

\alpha =\dfrac{x(4A+3B+2C+D)}{\dfrac{1}{3}m(4x)^2 }

\boxed{\alpha =\dfrac{3(4A+3B+2C+D)}{16mx } .}

Now, the angular momentum L of the stick is

L = I\omega,

where \omega is the angular velocity.

Since \omega = \alpha t, we have

$L = \dfrac{1}{3}m (4x)^2  *\dfrac{3(4A+3B+2C+D)}{16mx }* t$

L= (4A+3B+2C+D)x t

Therefore,   t = 2.0s, the angular momentum is

\boxed{ L= 2(4A+3B+2C+D)x. }

5 0
3 years ago
A soccer ball is kicked from the ground with an initial speed v at an upward angle θ. A player a distance d away in the directio
Nady [450]

Answer:

The speed of player is given by

V=\frac{2v^{2} 2sin\alpha.cos\alpha-gd }{2vsin\alpha}

Explanation:

The time of flight for a projectile motion is given by

T=\frac{2vsin\alpha }{g}    (i)

where t is the time of flight, v is the initial speed, and α is the angle.

Now the person must also reach the impact point of ball in the same time as above.

Now the total distance D the player needs to cover is basically R horizontal range of projectile minus the distance d, range R is given by,

R=\frac{2v^{2} sin2\alpha }{g}

Now the distance the player must cover is given by

D= R-d

D= \frac{2v^{2} sin2\alpha }{g}  - d

 

D=\frac{2v^{2}sin2\alpha-gd}{g}  (ii)

Now the average speed of player is given by

V=\frac{D}{T}   (iii)

Replacing the values of D and T from eq. (i) and (ii) in eq. (iii).

V=\frac{\frac{2v^{2} sin2\alpha-gd }{g}}{\frac{2vsin\alpha }{g} }

V=\frac{2v^{2} 2sin\alpha.cos\alpha-gd }{2vsin\alpha}

3 0
3 years ago
a rock is vertically upward with a velocity of 10 m/s. calculate the maximum height it reaches and time taken to reach that heig
lina2011 [118]

Answer:

maximum height: p(t) = Vo * t - 1/2 * g * t^2

p’(t) = v(t) = 0 = Vo - g*t. So, maximum height occurs when t = Vo / g

p(Vo / g) = Vo^2/g - 1/2 * g * (Vo/g)^2

Vo = 10 m / s. Let’s approximate g = 10 m / s^2

p(Vo / g) = 10^2 / 10 - 1/2 * 10 * (10/10)^2 = 10 - 5 = 5 meters (approximately)

Calculation of time:

v = u + gt

0 = 10√2 + (-10)t

-10√2 = -10t

2 = √2s

8 0
3 years ago
3. When 10^14 electrons are removed from a neutral metal sphere, the charge on the sphere
Umnica [9.8K]

Answer:

Β. 16 με

Explanation:

Data provided in the question

Number of electrons removed = 10^14

And, the charge on one electron = 1.6\times 10^ {-19C}

Based on the above information, the charged on the sphere is

Therefore when we remove the electrons

So, the equation would be

10^{14} \times 1.6 \times 10^{-19 C}

= 1.6 \times 10

Therefore the same amount of the positive charged would be developed

Hence, the correct option is B.

4 0
4 years ago
Any one any kind of clue on this please need help
devlian [24]

I honestly think it is B, if not I'm sorry for the incorrect answer, but B seems to be the only one to make sense

6 0
3 years ago
Other questions:
  • Please help me.
    13·1 answer
  • The legislative branch has the power to (3 points)
    8·2 answers
  • A child walks due east on the deck of a ship at 2 miles per hour. the ship is moving north at a speed of 18 miles per hour. find
    5·1 answer
  • a beaker has mass of 125 g. what is the mass of liquid if the beaker plus liquid have a mass of 232 g?
    5·1 answer
  • A student puts a beaker of boiling water where it touches a block of ice.
    8·1 answer
  • Simple Circuit and Ohm's Law Check-for-Understanding
    5·2 answers
  • What is the potential energy of a 2kg potted plant that is on a 2 meter high plant stand?
    10·1 answer
  • What is the relationship between power and voltage?
    12·1 answer
  • Two clear but non-mixing liquids each of depth 15 cm are placed together in a glass container. The liquids have refractive indic
    14·1 answer
  • In its own reference frame, a box has the shape of a cube 1.5 m on a side. This box is loaded onto the flat floor of a spaceship
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!