A comb run through one’s dry hair attracts small bits of paper. Why?

Q: The electron and proton of a hydrogen atom are separated (on the average) by a distance of…

A: Use Coulombs law to find the electric force and Newton's Gravitational law to find the gravitational…

Q: The hydrogen atom comprises of a proton and orbiting electron, which orbits at a radius of 5.29 x…

A: Change on protone=1.6*10-19CCharge on electron-e=-1.6*10-19Cr=5.29*10-11mForce between electron and…

Q: What is the physical basis of repulsion forces at very short distances? a) The gravitational…

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Q: Why does a balloon stick to your sweater?

A: If balloon rub with sweater, electron transfers on sweater hence it becomes negatively charged and…

Q: R has a magnitude of 104. Which of the following COULD NOT be Ry? Choose all that apply. 104 -104…

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Q: A construction worker places a compass at various positions on a wall until the compass needle…

A: We know that a current carrying conductors produce magnetic field. Since is compass is constructed…

Q: The force of attraction is taken as negative and force of repulsion as positive. why?

A: The given phenomenon can be understand by taking an example of electric force between two charge…

Q: Two small charged balls have a repulsive force of 0.12 N whe they are separated by a distance of…

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Q: In which of the following properties of matter does attraction ONLY exist? charge magnetic poles

A: Required : In which of the properties of matter only attraction occurs.

Q: A proton and an electron are initially at rest at a distance of 9x10-10 What will be their initial…

A: Given values: Distance between proton and electron, r=9×10-10 m Charge of electron, e=-1.6×10-19 C…

Q: O Two south poles are facing each other Two north poles are facing each other A north pole is facing…

A: From the diagram, we can see that the magnetic field lines of the magnetic are turning away from…

Q: The force between two charged objects drop off as     distance squared     1 over the distance…

A: The expression for the forces between two charged objects is F=kQ1Q2r2 so, which can be written as F…

Q: Two large objects that are 1 meter away from each other attract each other gravitationally and repel…

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Q: Why does a car always attract dust right after it is polished?

A: The car always attract dust right after polishing because of the static electric field.

Q: The force of attraction is weaker if : A.the distance of separation is zero B.the distance of…

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Q: Elena has two magnets. She puts one under a piece of paper. She holds the other above it. The…

A: The bar magnet consists of North Pole and a south pole. The magnetic field emerges from North Pole…

Q: Two protons in an atomic nucleus are typically separated by a distance of 2 ×10^15m.  The electric…

A: Given that---- q1= q2 = 1.6× 10 -19 C distance between charges r = 2× 10 -15 m Question ❓ find…

Q: If you cut a piece of bar margnet into 2 pieces, one piece will north pole, south pole, north and…

A: We have given a piece of bar magnet and then cut into two pieces. Now, we have to tell about the…

Q: The force exerted by a magnet is an example of _________.   A) Non-contact force B) Muscular force…

A: We have to mention the name of the force exerted by a magnet.

Q: Which of the followings sets of physical quantities, x, y and z contain one vector and 2. two scalar…

A: The physical quantities that depend on the magnitude only are known as the scalar quantity.

Q: Which of the following is a scalar quantity   A) Displacement B) Electric field C) Acceleration D)…

A: SCALAR QUANTITY :-  Scalar quantity are the quantity that are described only by a magnitude . they…

Q: 14 The friction between a train and the track it travels on can be reduced by - F generating a north…

A: To have less friction between rail tracks and the train we have to create a repulsive force between…

Q: 96. *The mass of an oxygen nucleus is about 16 times that of a proton. A proton traveling at 5 x 10'…

A: Given data Vi=5×105 m/secVf=5×105 m/sec

Q: Cecilia puts two magnetic toy trains very close to each other on a track. What will happen next, and…

A: Required : What will happen next, and why.

Q: 5m 4 83 ,= +2u C = - 2 u C 83 = + 4u C FIND FORCE ON 81: THE NET

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Q: A positive charge of 4.0 µC exerts an attractive force of 6N on an unknown charge 20 cm away. The…

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Q: A force of 8.3 N makes an angle of 21° (counter-clockwise) with the +X axis. The X component of the…

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Q: A force of 8.3 N makes an angle of 17° (counter-clockwise) with the +X axis. The Y component of the…

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Q: Cont Fill in the blanks. is a force between two objects (or an object and a a. surface) that is in…

A: Contact force acts between objects having in  contact to each other On the other hand,  non contact…

Q: In the Bohr model of the hydrogen atom the velocity of the electron is approximately 2.2 x 10° m/s.…

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Q: 22. law states that the magnitude of the force exerted by an ideal spring is directly proportional…

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Q: 3. In the Bohr model of the hydrogen atom, the electron revolves around the nucleus. If the radius…

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Q: A physics lab instructor is working on a new demonstration. She attaches two identical conducting…

A: The below figure represents the free body diagram of two identical conducting balls.

Q: Two charged particles moving with velocities vį and v2 have some separation between them. The ratio…

A: Given data: Velocity of charged particle 1 is, v1. Velocity of charged particle 2 is, v2.

Q: In a thundercloud, there may be electric charges of +40C, near the top of the cloud and -40C 0 C…

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Q: In a thundercloud there may be electric charges of +45.0 C near the top of the cloud and -45.0 C…

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Q: Classification of forces in physics is Electrical force O Gravitational force O All Nuclear force O…

A: The classification of forces in Physics is given as under. Gravitational force Nuclear force…

Q: Pick out the only scalar quantity   A) power B) Electric field C) magnetic momentum D) average…

A: Answer:   The expression of power is given by, P=Wt Here, W is the work done and t is the time.   In…

Q: Two Styrofoam balis of mass 10 g are suspended by threads of length 25 cm. the balls are charged,…

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Q: the acceleration of the proton when it has a velocity

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Q: 11 12 13 A 24 V R1 R2 R3 10 0 20 0 30 0 B. -↑

A: Given that,  Resistance, R1 = 10 Ohm Resistance, R2 = 20 Ohm Resistance, R3 = 30 Ohm Voltage, V = 24…

Q: toy train has an engine that weighs 150 grams. It is coupled to a car with a mass of 30 grams. The…

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Q: True or False: By rubbing, some objects such as glass rod or an ebonite rod with silk or fur, a/an…

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Q: As two positive charges are brought closer together (a) the repulsive force between them will…

A: Let q1 and q2 be two charges separated by distance d. As both charges brought together.

Q: What is static electricity? А. Electricity that flows in one direction В. Electricity that is sent…

A: When two objects are rubbed together, bhoot acquires electrical charge on the surface, this charge…

Q: A bar magnet is divided into two pieces. Which of the following statements is true about the force…

A: Bar magnet : A bar magnet is a rectangular piece of an object, made up of iron, steel or any other…

Q: with an essentially uniform width of 21.0 m has a constant water current of 1.50 m/s going towards…

A: Given that  Width of river d= 21m Speed of river Vrg=1.50m/s Speed of man Vmg= 2m/s

Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.