Ask question

Ask question

All categories

bearhunter [10]

2 years ago

11

When different resistors are connected in parallel across an ideal battery, we can be certain that: a) their equivalent resistan

ce is equal to the average of the individual resistances. b) the potential difference across each is the same. c) the power dissipated in each is the same. d) the same current flows in each one. e) their equivalent resistance is greater than the resistance of any one of the individual resistances.

1 answer:

sergeinik [125]2 years ago

5 0

Answer:

b) the potential difference across each is the same.

Explanation:

When resistors are connected in parallel with each other

then the terminals of all the resistors will connected across the terminals of the battery

So we know the potential difference of the battery is same across all the resistors

So we can say that the equivalent resistance of all the resistance is

$\frac{1}{R} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3}$

so its not the mean of all resistors

also we know that the resistance are all different so power across each resistance is different given as

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

also current in each resistance is also different and given by

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

so correct answer will be

b) the potential difference across each is the same.

You might be interested in

A man ran the 200m race within 19.19 seconds. Calculate the speed of the man during the race

natta225 [31]

Answer:

around 23 miles per hour

4 0

3 years ago

Transformer is used in rectifier step up and step down voltage?<br>

tensa zangetsu [6.8K]

Answer:

While the use of the type of transformer in a rectifier depends on the voltage requirement or to meet desired operating conditions, a step-down transformer is used mainly to reduce the voltage. It is used to bring the high AC voltage level to a reasonable value or the desired output voltage.

Explanation:

Hope it helps

Correct me if Im wrong

3 0

2 years ago

A radar station detects an airplane approaching directly from the east. At first observation, the range to the plane is 375.0 m

Gekata [30.6K]

Answer:

819.78 m

Explanation:

<u>Given:</u>

OA = range of initial position of the airplane from the point of observation = 375 m
OB = range of the final position of the airplane from the point of observation = 797 m
$\theta$ = angle of the initial position vector from the observation point = $43^\circ$
$\alpha$ = angle of the final position vector from the observation point = $123^\circ$
$\vec{AB}$ = displacement vector from initial position to the final position

A diagram has been attached with the solution in order to clearly show the position of the plane.

$\vec{OA} = OA\cos \theta \hat{i}+OA \sin \theta \hat{j}\\\Rightarrow \vec{OA} = 375\ m\cos 43^\circ \hat{i}+375\ m\sin 43^\circ \hat{j}\\\Rightarrow \vec{OA} = (274.26\ \hat{i}+255.75\ \hat{j})\ m\\\vec{OB} = OB\cos \alpha \hat{i}+OB \sin \alpha \hat{j}\\\Rightarrow \vec{OB} = 797\ m\cos 123^\circ \hat{i}+797\ m\sin 123^\circ \hat{j}\\\Rightarrow \vec{OB} = (-434.08\ \hat{i}+668.42\ \hat{j})\ m$

Displacement vector of the airplane will be the shortest line joining the initial position of the airplane to the final position of the airplane which is given by:

$\vec{AB}=\vec{OB}-\vec{OA}\\\Rightarrow \vec{AB} = (-434.08\ \hat{i}+668.42\ \hat{j})\ m-(274.26\ \hat{i}+255.75\ \hat{j})\ m\\\Rightarrow \vec{AB} = (-708.34\ \hat{i}+412.67\ \hat{j})\ m$

The magnitude of the displacement vector = $\sqrt{(-708.34)^2+(412.67)^2}\ m = 819.78\ m$

Hence, the magnitude of the displacement of the plane is 819.67 m during the period of observation.

8 0

3 years ago

Explain the difference between voluntary and involuntary muscles.

Kruka [31]

Muscles that are under your conscious control are called voluntary muscles, while muscles that are not under your conscious control are called involuntary muscles

3 0

3 years ago

What's the way to building a time machine and I will reward you beautifully.DENY PHYSICS YOUNG JEDI

quester [9]

Easy brother. You just need some luck.

Inside every black hole is a time machine that allows you to turn back time or go forward and teleport to any empty space in the universe. However to do so you need to get inside the black hole without dieing.

To do so you must make the hardest and lightest box you can make, fill it with a very dense kind of air that will allow you to breathe but not move. Then seal yourself In the box.
Get someone to throw you in the black hole. And if you come back alive give me a Brainliest answer ;)

4 0

3 years ago