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3 years ago

According to Ohm's law, determine the

Physics

1 answer:

kap26 [50]3 years ago

4 0

Solution :

We know, by to Ohm's law :

$Current = \dfrac{Voltage}{Resistance}$

For, case 1 :

$I = \dfrac{5}{20}\ A = 0.25 \ A$

For, case 2 :

$I = \dfrac{20}{20} \ A\\\\I = 1 \ A$

For, case 3 :

$I = \dfrac{50}{20}\ A\\\\I = 2.5 \ A$

Therefore, this is the required solution.

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The 5-lb collar is released from rest at A and travels along the frictionless guide. Determine the speed of the collar when it s

Sholpan [36]

Answer:

Explanation:

Stiffness of spring k equal to 4 lb/ft.

Unstretched length of the spring L is equal to 0.5 feet.

Weight of the collar W is 15lb

Radius of curvature of curve guide is 1 feet

length of vertical rod is 1.5 feet

Initial speed of collar when released from rest at A is 0 feet per seconds

use the energy conservation equation

$P_A +K_A=P_B+K_B$

Estimate the potential energy , component as position B as below

$P_A=Wh_1+\frac{1}{2} ks^2_1\\\\=5\times(1.5+1)+\frac{1}{2} \times 4 \times(1.5+1-0.5)^2\\\\=20.5lb.ft$

Estimate the kinetic energy , component as position A as below

$K_A=\frac{1}{2} \frac{W}{g} V^2_1\\\\=\frac{1}{2} \frac{5}{32.2} \times0^2\\\\=0lb.ft$

Estimate the kinetic energy , component as position B as below

$K_A=\frac{1}{2} \frac{W}{g} V^2_2\\\\=\frac{1}{2} \frac{5}{32.2} \times V^2_2\\\\=00777V^2_2$

Substitute 20.5lb- ft for $P_A$

0.5lb-ft for $P_B$

0lb -ft for $K_A$

$0.0777V_2^2 for K_B$

$20.5+0=0.5+0.777V^2_2\\\\V^2_2=257.6\\\\V_2=16.05$

= 16.05ft/sec

7 0

3 years ago

When the course deviation indicator (CDI) needle is centered during an omnireceiver check using a VOR test signal (VOT), the omn

lilavasa [31]

Answer:

0° FROM or 180° TO

Explanation:

A course deviation indicator or the CDI may be defined as an avionics tool or instrument that is used in the aircraft navigation which is used to determine an aircraft's lateral position with relation to a course.

While using the VOT service, we should tune the VOT frequency of the VOR receiver. And with the CDI leveled centered, the omnibearing selector or the OBS should read as 0° with the TO/FROM indicator showing 'FROM'. Else the OBS should read as 180° with the TO/FROM indication showing 'TO.'

4 0

3 years ago

A metal ball of specific heat capacity 400 joule per kgper celsius is allowed to fall from a height of 100 metre .If the ball on

ExtremeBDS [4]

First we'll calculate the energy it posesses

G.P.E = mgh = 0.2 * 10 * 100 = 200 J

Now we'll calculate the temperature rise

Q = m * c * (t2 - t1)
Q/(m * c) = t2-t1
t2 = Q/(m * c) + t1 = 200/(0.2 * 400) + 0 = <span>2.5 C</span>

7 0

3 years ago

22. In an experiment to determine the density of a soil using a density bottle, the following measuren were recorded. Mass of em

Delicious77 [7]

Answer:1

Explanation:1

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3 years ago

A bird of mass 1.5 kg is flying at 8 m/s at a height of 50 m above the ground. What is its

Bas_tet [7]

Answer:

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Explanation:

hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello

6 0

3 years ago