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3 years ago

How does a galvanometer use a magnetic field to indicate the strength of an electric current?

Physics

2 answers:

NISA [10]3 years ago

4 0

Explanation:

Galvanometer: It is a device which shows deflection when the current flows in the circuit. If it does not show any deflection, then it means that the current is not flowing in the circuit.

There is a magnetic field around the current carrying conductor.

It is developed from the observation that the needle of the compass shows deflection near the current carrying wire.

Galvanometer: It consists of compass needle attached to a coil. The coil is allowed to pivot freely in the uniform magnetic field. The magnetic field is created by the poles of the permanent magnet.

In galvanometer,the torque on a current loop in uniform magnetic field is used to measure magnetic field.

arlik [135]3 years ago

3 0

An electromagnet of a spring is placed between the poles of a permanent magnet. when there is current in the coil, the resulting magnetic field lines up with the field of the permanent magnet, and indicates the strength of the electric current by deflecting a needle on a dial.

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A car traveling in a straight line has a velocity of 3.29 m/s at some instant. After 4.99 s, its velocity is 8.29 m/s.

seraphim [82]

Use the definition of average acceleration:

a = ∆v / ∆t

We have

a = (8.29 m/s - 3.29 m/s) / (4.99 s)

a = 1.002 m/s²

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3 years ago

What is potential difference

lisabon 2012 [21]

Answer:

VOLTAGE

Explanation:

Potential difference is the difference in the amount of energy that charge carriers have between two points in a circuit. ... A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in a circuit

5 0

3 years ago

Read 2 more answers

A 55-liter tank is full and contains 40kg of fuel. Find using Sl units: • Density p. • Specific Weight y • Specific Gravity Answ

Pavlova-9 [17]

Answer:

p = 727.273 kg/m3, y = 7134.545 N/m^3, SG = 0.7273

Explanation:

Density is simply the amount of mass of a substance per unit of volume. It can be found by dividing the mass in kg by the volume im m^3:

$p = \frac{m}{v} = \frac{40kg}{55lt*\frac{1 m^3}{1000 lt}} = 727.273 kg/m^3$

Specific weight is the weight of the substance per unit of volume. The weight is the mass of the material times the gravity, and it represents the force that the earth exerts on an object. Another way of calculate this value, its multiplying the density of the fuel times the gravity. Then:

$y = p*g = 727.273 kg/m^3 * 9.81 m/s^2 = 7134.545 N/m^3$

Specific Gravity is the ratio of the density of the substance to the density of a reference substance. For liquids, the reference substance is water at 4°C, which has a density of about 1000 kg/m^3.

$SG =\frac{ p_{fuel}}{p_{water}} = \frac{727.273 kg/m^3}{1000 kg/m^3} = 0.7273$

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3 years ago

Which of the following is true about light waves and sound waves? A. Sound waves can move at different speeds, but light waves a

vivado [14]

Answer:

Explanation:

Sound waves speed up noticeably when moving through a solid or liquid, because all it is is just particles colliding; and particles are way closer together with those states of matter.

The speed of light can change when moving through different substances, but this is dependent on complicated factors such as frequency, polarization, intensity, et. cetera

The important part is that it does change speed, so your answer is C.

Hope this helps!

3 0

4 years ago

Which is a common unit of density? A. The g B. G/ml C. Cm3 D. G/s

Anika [276]

The correct answer is B.g/mL

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4 years ago