Selina solutions

Selina solutions

Grade 8

Electricity | Objective Questions - II

Question 1

Q1) Write true or false

(a) the number of electrons and protons in an atom are same.

(b) If the charge is not in motion, we call it static electricity.

(c) Human body is a conductor of electricity.

(d) When an ebonite rod is rubbed with fur, the electrons move from ebonite to fur.

(e) When, glass rod is rubbed with dry silk cloth, the electrons move from glass to silk.

(f) The cap of gold leaf electroscope is made of copper.

(g) If a glass rod rubbed with silk is brought near the cap of a negatively charged electroscope, the divergence of leaves will decrease.

(h) In induction, a positively charged body can make an uncharged body positively charged.

(i) A lightning conductor saves the building from lightning.

(j) WHen a comb is rubbed with dry hair both comb and paper get similarly charged.

(k) A glass rod rubbed with silk repels an ebonite rod rubbed with fur.

(l) When an ebonite rod is rubbed with fur. The protons move from the ebonite rod to the fur.

(m) A conductor has a large number of free electrons.

(n) An ebonite rod can be charged by touching it with a charged copper rod.

(o) To find whether a body is charged or not, an uncharged electroscope is used.

(p) To find whether the charge on a body is positive or negative, an uncharged electroscope is used.

(q) If a negatively charged rod is brought near a negatively charged pith ball electroscope, the pith ball will be stuck with the rod.

Solution:

(a) True

(b) True

(c) True

(d) False

(e) True

(f) False

(g) True

(h) False

(i) True

(j) False

(k) False

(l) False

(m) True

(n) False

(o) True

(p) False

(q) False

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subject-cta

Question 1

Q1) Write true or false

(a) the number of electrons and protons in an atom are same.

(b) If the charge is not in motion, we call it static electricity.

(c) Human body is a conductor of electricity.

(d) When an ebonite rod is rubbed with fur, the electrons move from ebonite to fur.

(e) When, glass rod is rubbed with dry silk cloth, the electrons move from glass to silk.

(f) The cap of gold leaf electroscope is made of copper.

(g) If a glass rod rubbed with silk is brought near the cap of a negatively charged electroscope, the divergence of leaves will decrease.

(h) In induction, a positively charged body can make an uncharged body positively charged.

(i) A lightning conductor saves the building from lightning.

(j) WHen a comb is rubbed with dry hair both comb and paper get similarly charged.

(k) A glass rod rubbed with silk repels an ebonite rod rubbed with fur.

(l) When an ebonite rod is rubbed with fur. The protons move from the ebonite rod to the fur.

(m) A conductor has a large number of free electrons.

(n) An ebonite rod can be charged by touching it with a charged copper rod.

(o) To find whether a body is charged or not, an uncharged electroscope is used.

(p) To find whether the charge on a body is positive or negative, an uncharged electroscope is used.

(q) If a negatively charged rod is brought near a negatively charged pith ball electroscope, the pith ball will be stuck with the rod.

Solution:

(a) True

(b) True

(c) True

(d) False

(e) True

(f) False

(g) True

(h) False

(i) True

(j) False

(k) False

(l) False

(m) True

(n) False

(o) True

(p) False

(q) False

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