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3 years ago

Does the galvanometer deflect to the left or the right when:________

Physics

1 answer:

igomit [66]3 years ago

7 0

Complete question is;

Does the galvanometer deflect to the left or the right when

a) the magnet is being pushed in

b) the magnet is being pulled out

c) the magnet is being held steady?

Answer:

Option A - when the magnet is being pulled out

Explanation:

Faraday’s law of electromagnetic induction states that: “Voltage is induced in a circuit whenever relative motion exists between the conductor and the magnetic field, and the magnitude of the voltage will be proportional to the rate of change of the flux”.

Now, applying it to the question, When the magnet is moved towards the sensitive center of the galvanometer and then pulled out, the needle of the galvanometer will deflect away from its center position in one direction only but when it is held steady, the needle of the galvanometer will return back to zero.

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Located adjacent to red on the electromagnetic spectrum, and having a longer wavelength, is ________ radiation, which we cannot

Kaylis [27]

Answer:

infrared radiation

Explanation:

infrared radiation - infrared radiation is part of electromagnetic radiation which wavelength range from about 700 nano meters (nm) to 1 millimeter (mm).

Infrared radiation is invisible to naked eye, however it can be felt as heat for longer duration infrared waves. Any type of radiation — whether it is visible light or radio waves — may possibly be hazardous if extremely focused in a high-powered narrow beam

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4 years ago

In a glider stunt at an air show, a towing airplane (motorized plane pulling the gliders) takes off from a level runway with two

irakobra [83]

Answer:

minimum length of runway is needed for take off 243.16 m

Explanation:

Given the data in the question;

mass of glider = 700 kg

Resisting force = 3700 N one one glider

Total resisting force on both glider = 2 × 3700 N = 7400 N

maximum allowed tension = 12000 N

from the image below, as we consider both gliders as a system

Equation force in x-direction

2ma = T -f

a = T-f / 2m

we substitute

a = (12000 - 7400 ) / (2 × 700 )

a = 4600/1400

a = 3.29 m/s²

Now, let Vf be the final speed and Ui = 0 ( as starts from rest )

Vf² = Ui² + 2as

solve for s

Vf² = 0 + 2as

2as = Vf²

s = Vf² / 2a

given that take of speed for the gliders and the plane is 40 m/s

we substitute

s = (40)² / 2×3.29

s = 1600 / 6.58

s = 243.16 m

Therefore, minimum length of runway is needed for take off 243.16 m

4 0

3 years ago

When jumping, a flea accelerates at an astounding 1400 m/s2 , but over only the very short distance of 0.55 mm . If a flea jumps

Brums [2.3K]

Answer:

0.079 m or 79 mm

Explanation:

Using the equation of motion

v = √(2as)

Where v is the velocity

a is acceleration = 1400m/s²

s is the distance = 0.55 mm = 0.00055m

Therefore

= √(2 × 1400m/s² × 0.00055 m) = 1.54 m/s

Therefore; initial velocity = 1.54 m/s

Then we use the equation of motion s = v² / 2g

Take g = 9.8 m/s²

Therefore

= (1.54m/s)² / 19.6 m/s²

= 0.079 m or 79 mm

8 0

4 years ago

Read 2 more answers

A scientific theory states that the universe is expanding. Which of these statements is correct about this theory?

Stolb23 [73]

A scientific theory states that the universe is expanding. the statement is correct about this theory is: d. it is a well supported explanation which cannot become law. a theory is very different from a law. a theory explain why something happen.

hope this help

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3 years ago

Read 2 more answers

A circular loop of wire with a radius of 12.0 cm and oriented in the horizontal xy-plane is located in a region of uniform magne

kirza4 [7]

Answer:

The average induced emf is 29.06 V

Explanation:

Given;

radius of the circular loop, r = 12.0 cm = 0.12 m

magnetic field strength, B = 1.8 T

time interval = 2.8 ms = 0.0028 s

Area of the circular loop, A = πr² = π (0.12)² = 0.0452 m²

$e.m.f =\frac{BA}{t}$

where;

B is magnetic field

A is area

t is time

substitute the values given in the above equation to calculate the average emf that will be induced in the wire loop during the extraction process.

$e.m.f =\frac{1.8 *0.0452}{0.0028} = 29.06 \ V$

Therefore, the average induced emf is 29.06 V

5 0

3 years ago