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Which among the following cannot be the charge of a charged body? a) 4.8*10-14 Coulomb b) 6.4*10-15 Coulomb c) 5*10-14 Coulomb d) 3.2*10-10 Coulomb
Answer: c Explanation: Charge of a body must be an integral multiple of charge of an electron. 5*10-14 is not an integral multiple of (1.602*10-19 Coulomb) which is equal to the charge of an electron. But we can see that 4.8, 6.4, 3.2 are integral multiples of 1.6.
Answer: c
See lessExplanation: Charge of a body must be an integral multiple of charge of an electron. 5*10-14 is not an integral multiple of (1.602*10-19 Coulomb) which is equal to the charge of an electron. But we can see that 4.8, 6.4, 3.2 are integral multiples of 1.6.
. Two equally charged spheres attract each other. Now if they touch each other then they will _____ a) Attract each other with the same amount of force b) Repel each other c) Attract each other with less amount of force d) Don’t attract or repel
Answer: d Explanation: The two spheres are oppositely charged by the same amount. So if they come in contact, both of their charges are neutralized. So they become uncharged and don’t attract or repel each other.
Answer: d
See lessExplanation: The two spheres are oppositely charged by the same amount. So if they come in contact, both of their charges are neutralized. So they become uncharged and don’t attract or repel each other.
. Number of electrons in 1 Coulomb charge is _________ a) 6.25*1021 b) 6.25*1020 c) 6.25*1025 d) 6.25*1023
Answer: a Explanation: Electron has the charge of 1.602*10-19 Coulomb. So, the number of electrons in 1 Coulomb of charge is 11.602∗10−19 = 6.25*1021. This huge number of electrons can be accumulated to form 1C of charge. Thus, we can conclude that we need Avogadro’s number of electrons (approximateRead more
Answer: a
See lessExplanation: Electron has the charge of 1.602*10-19 Coulomb. So, the number of electrons in 1 Coulomb of charge is 11.602∗10−19 = 6.25*1021. This huge number of electrons can be accumulated to form 1C of charge. Thus, we can conclude that we need Avogadro’s number of electrons (approximately) to get 100C charges.
. 1 Coulomb = ________ Electro Static Unit. a) 3*109 b) 3*108 c) 1.602*10-19 d) 2*109
Answer: a Explanation: 1 Coulomb means 3*109 Electro Static Unit of charge. Coulomb and ESU are two different units of charge and their conversion formula is necessary. Coulomb is the unit of charge in the SI system and esu is the unit of charge in the CGS system.
Answer: a
See lessExplanation: 1 Coulomb means 3*109 Electro Static Unit of charge. Coulomb and ESU are two different units of charge and their conversion formula is necessary. Coulomb is the unit of charge in the SI system and esu is the unit of charge in the CGS system.
When a glass rod is rubbed with silk, what kind of charge will be developed on glass?
a) b) c) d) Cannot predict Answer: a Explanation: According to electrostatic series, glass is situated above silk. So, if the glass is rubbed with silk, the positive charge on glass and negative charge on silk is produced. Similarly, we can predict what is the nature of charge if we rub two dRead more
a)
b)
c)
d) Cannot predict
Answer: a
See lessExplanation: According to electrostatic series, glass is situated above silk. So, if the glass is rubbed with silk, the positive charge on glass and negative charge on silk is produced. Similarly, we can predict what is the nature of charge if we rub two di-electric substances together.
Gold-leaf electroscope can be used _______ a) Only to detect the presence of charge b) To detect the presence of charge as well as its nature (positive or negative) c) To measure the surface charge density d) To measure current
Answer: b Explanation: If the apparatus is initially in contact with some positively charged body and then comes in contact with another charged body and if the divergence increases we can deduce that the second body is also positively charged. If the divergence decreases then the second body must bRead more
Answer: b
Explanation: If the apparatus is initially in contact with some positively charged body and then comes in contact with another charged body and if the divergence increases we can deduce that the second body is also positively charged. If the divergence decreases then the second body must be negatively charged.
See lessDr. Gilbert tried to hold a brass rod by hand and induce static electricity in it by friction. Why did he fail? a) Static electricity is induced only on insulators while brass is conducting b) The induced static charge flew through his hand and body to the ground c) The static charge was not produced at all d) It is not possible to induce static electricity by friction
Answer: b Explanation: The human body is a good conductor and hence the charge produced by friction flew through his body to the ground. We can tackle the problem simply by holding the brass rod with the help of some insulated holder.
Answer: b
See lessExplanation: The human body is a good conductor and hence the charge produced by friction flew through his body to the ground. We can tackle the problem simply by holding the brass rod with the help of some insulated holder.
Which one of the following is the correct diagram of charge distribution in a hollow sphere?
Explanation: The same charges repel each other. So, they try to maintain maximum distance from each other and hence they try to remain at the outer surface of an object. If the charge remains on the inner surface or throughout the body, they will repel each other with greater force.
Explanation: The same charges repel each other. So, they try to maintain maximum distance from each other and hence they try to remain at the outer surface of an object. If the charge remains on the inner surface or throughout the body, they will repel each other with greater force.
See lessWhat happens to the plates of the apparatus if we measure alternating charge using a Gold-leaf oscilloscope? a) It doesn’t diverge at all b) It diverges momentarily c) The plates give a proper divergence d) The degree of divergence increases and decreases repeatedly
Answer: c Explanation: The divergence of the plates of the Gold-leaf oscilloscope depends only on the presence of a charge, not on the quality of charge i.e. positive or negative. So, if the charge changes from positive to negative and vice versa the degree of divergence of the plates remains the saRead more
Answer: c
See lessExplanation: The divergence of the plates of the Gold-leaf oscilloscope depends only on the presence of a charge, not on the quality of charge i.e. positive or negative. So, if the charge changes from positive to negative and vice versa the degree of divergence of the plates remains the same
Why is gold used in the Gold-leaf electroscope? a) Gold is easily available in nature b) Gold is malleable c) Gold is conducting in nature d) Gold is cheap
Answer: b Explanation: Though gold is a costly metal it is used in electroscope because of the property malleability. This means very thin and light sheets can be formed from gold simply by hammering or rolling and hence the deflection of the light gold plates increases.
Answer: b
Explanation: Though gold is a costly metal it is used in electroscope because of the property malleability. This means very thin and light sheets can be formed from gold simply by hammering or rolling and hence the deflection of the light gold plates increases.
See less