Recent questions tagged field

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How does the magnetic field line flux through a closed surface depend on the number and strength of the elementary magnets enclosed by the surface?

asked Aug 15, 2022 in General Knowledge by ♦GaussTheBot Diamond (78,467 points) | 106 views

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What is the relationship between the density of magnetic field lines and the magnitude of the field ?

asked Aug 15, 2022 in General Knowledge by ♦GaussTheBot Diamond (78,467 points) | 120 views

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How can we map out the magnetic field?

asked Aug 15, 2022 in General Knowledge by ♦GaussTheBot Diamond (78,467 points) | 98 views

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Why does Earth have the strongest magnetic field among the terrestrial worlds? Which of the following is the right choice? Explain your answer.

asked Jul 10, 2022 in General Knowledge by ♦GaussTheBot Diamond (78,467 points) | 216 views

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A particle of mass \(m\) and charge \(Q\) and velocity \(V\) is directed toward a uniform electric field of strength \(E\) and travels a distance \(d\). How far does the particle travel if the original velocity is doubled and the mass is cut in half?

asked Jul 8, 2022 in General Knowledge by ♦GaussTheBot Diamond (78,467 points) | 118 views

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A beam of electrons has speed \(10^{7} \mathrm{~m} / \mathrm{s}\). It is desired to use the magnetic field of the Earth, \(5 \times 10^{-5} T\), to bend the electron beam into a circle. What will be the radius of this circle?

asked Jul 8, 2022 in General Knowledge by ♦GaussTheBot Diamond (78,467 points) | 89 views

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A magnetic force acting on a beam of electrons can change its Which of the following is the right choice? Explain your answer.

asked Jul 8, 2022 in General Knowledge by ♦GaussTheBot Diamond (78,467 points) | 134 views

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The magnetic force on a moving charged particle can change the particle's Which of the following is the right choice? Explain your answer.

asked Jul 8, 2022 in General Knowledge by ♦GaussTheBot Diamond (78,467 points) | 156 views

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Suppose that an elementary magnet is situated at the origin and that its axis corresponds to the \(z\)-axis.

asked Jul 2, 2022 in Mathematics by ♦GaussTheBot Diamond (78,467 points) | 86 views

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Let \(f\) be a \(C^{1}\) vector field on a neighbourhood of the annulus \[ A=\left\{\mathbf{x} \in \mathbb{R}^{2} \quad: 1 \leq|x| \leq 2\right\} \]

asked Jul 2, 2022 in Mathematics by ♦GaussTheBot Diamond (78,467 points) | 78 views

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Consider the motions of non-sero-rest-mass particles in a gravitional field created by a mass \(M\) and characterized by the Schwarzschild metric

asked Jul 1, 2022 in Mathematics by ♦GaussTheBot Diamond (78,467 points) | 53 views

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State Einstein's field equations in general relativity

asked Jan 11, 2022 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 141 views

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A basketball player scores on \(40 \%\) of 2 -point field goal attempts, and on \(30 \%\) of 3 -point of field goal attempts. Find the player's overall field goal percentage.

asked Jan 3, 2022 in Mathematics by ♦MathsGee Platinum (164,924 points) | 241 views

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Two objects of masses \(80 \mathrm{~kg}\) and \(50 \mathrm{~kg}\) are separated by a distance of \(0.2 \mathrm{~m}\). If the gravitational constant is \(6.6 \times 10^{-11} \mathrm{Nm} \mathrm{kg}\),

asked Nov 10, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 262 views

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How many beta particle(s) are emitted in the radioactive decay of \({ }_{79}^{198} \mathrm{Au} \leftarrow{ }_{80}^{198} \mathrm{Hg} ?\)

asked Nov 10, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 214 views

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In storing magnets, keepers are used to

asked Nov 10, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 198 views

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How does an If...else Statement work in programming?

asked Oct 16, 2021 in Data Science & Statistics by ♦MathsGee Platinum (164,924 points) | 275 views

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How does an If Statement work in programming?

asked Oct 16, 2021 in Data Science & Statistics by ♦MathsGee Platinum (164,924 points) | 258 views

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When a fast charged particle traverses a dielectric medium at a velocity exceeding the velocity of light in that medium, radiation is emitted. This radiation is known as:

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 244 views

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Which of the following are the parts of a DC generator that convert the AC in the armature to DC in the external circuit. Are these parts the:

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 389 views

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The greatest induced EMF will occur in a straight wire moving at constant speed through a uniform magnetic field when the angle between the direction of the wire's motion and the direction of the magnetic field is

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 382 views

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A copper rod which is 1 centimeter in diameter carries a current of 5 amps. The current is distributed uniformly throughout the rod. The magnetic field half way between the axis of the rod and its outside edge is:

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 274 views

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An infinitely long wire carries a current of three amps. The magnetic field outside the wire:

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 380 views

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A charged particle is moving in a UNIFORM magnetic field. If the direction of motion of the charged particle is parallel to the magnetic field, describe the shape of the charged particle's path.

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 448 views

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A circuit which employs a DIRECT CURRENT source has a branch which contains a capacitor. After the circuit has reached a steady state, what is the magnitude of the current in the circuit branch which contains the capacitor?

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 274 views

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A 10 farad capacitor is used in a circuit. The voltage difference between the plates of the capacitor is 20 volts. What is the magnitude of the charge on each of the capacitor's plates?

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 395 views

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A constant potential difference is applied across the plates of a parallel-plate capacitor. Neglecting any edge effects, the electric field inside the capacitor is:

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 514 views

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For a parallel-plate capacitor with plate area "A" and plate separation "d", the capacitance is proportional to which of the following?

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 301 views

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For an infinite sheet of positive charge, the electric field lines:

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 410 views

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For a negative point charge, the electric field vectors:

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 363 views

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Five volts are applied across the plates of a parallel plate capacitor. The distance of separation of the plates is .02 meters. What is the magnitude of the electric field inside the capacitor?

asked Oct 5, 2021 in General Knowledge by Digitized Wooden Status (1,442 points) | 612 views

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Three point charges are in a straight line. Their charges are \(Q_{1}=+4 \times 10^{-9} \mathrm{C}, Q_{2}=+2 \times 10^{-9} \mathrm{C}\) and \(Q_{3}=-6 \times 10^{-9} \mathrm{C}\).

asked Oct 1, 2021 in General Knowledge by Student SIlver Status (11,402 points) | 546 views

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Two positive point charges, \(q_{1}=+16 \times 10^{-6} \mathrm{C}\) and \(\mathrm{q}_{2}=+4 \times 10^{-6} \mathrm{C}\), are separated by a distance \(3 \mathrm{~m}\).

asked Oct 1, 2021 in General Knowledge by Student SIlver Status (11,402 points) | 356 views

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Two point charges, \(Q_{1}\) and \(Q_{2}\), a distance \(3 \mathrm{~m}\) apart, are shown below. The charge on \(Q_{1}\) is \(-14 \mu \mathrm{C}\) and the charge on \(Q_{2}\) is \(+20 \mu \mathrm{C}\)

asked Oct 1, 2021 in General Knowledge by Student SIlver Status (11,402 points) | 334 views

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What is an electric field at a point?

asked Oct 1, 2021 in General Knowledge by Student SIlver Status (11,402 points) | 232 views

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What is an electric field?

asked Oct 1, 2021 in General Knowledge by Student SIlver Status (11,402 points) | 190 views

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Below is a diagram of a charged object (conductor) at electrostatic equilibrium. Points \(A, B\), and \(D\) are on the surface of the object, whereas point \(\mathrm{C}\) is located inside the object.

asked Oct 1, 2021 in General Knowledge by Student SIlver Status (11,402 points) | 430 views

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An electric field strength created by charge \(\mathrm{Q}\) is measured to be \(40 \mathrm{~N} / \mathrm{C}\) at a distance of \(0.2 \mathrm{~m}\) from the center of the charge.

asked Oct 1, 2021 in General Knowledge by Student SIlver Status (11,402 points) | 1,199 views

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Calculate the magnitude of the electric force of point P

asked Sep 30, 2021 in General Knowledge by anonymous | 276 views

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What is the importance of the magnetic field to life on Earth?

asked Aug 30, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 1,701 views

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What is diamagnetism?

asked Aug 30, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 133 views

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What is ferromagnetism?

asked Aug 30, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 164 views

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Why is the net magnetic field in any object zero?

asked Aug 30, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 309 views

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What is a magnetic field?

asked Aug 30, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 184 views

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What is electrical potential?

asked Aug 30, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 181 views

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Give examples of phenomena that are affected by Earth's magnetic field.

asked Aug 30, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 450 views

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Explain how a compass indicates the direction of a magnetic field.

asked Aug 30, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 935 views

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Explain why permanent magnets have a magnetic field around them.

asked Aug 29, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 265 views

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Describe what is meant by the term magnetic field.

asked Aug 29, 2021 in General Knowledge by ♦MathsGee Platinum (164,924 points) | 232 views

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In an observation, there is a high correlation between the time a person sleeps and the amount of productive work he does. What can be inferred from this?

asked Jul 23, 2021 in Data Science & Statistics by Student SIlver Status (11,402 points) | 266 views

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