Convention of Positive and Negative Charges
Trending Questions
When a glass rod is rubbed with silk cloth, then what kind of the electric charge produced on the glass rod?
A glass rod is rubbed with silk. State the kind of charge acquired by each.
What are the two kinds of electric charges ?
When a plastic comb is rubbed with dry hair, the hair get positively charged by friction. In this process:
(a) the hair lose some positive protons
(b) the hair gain some positive protons
(c) the hair lose some negative electrons
(d) the hair gain some negative electrons
Question 3(b)
State whether the following statement is true or false.
A charged glass rod attracts a charged plastic straw.
Question 4
Two charged objects are brought close to each other. What kind of interaction can be observed?
- Telescope
- Periscope
- Electroscope
- Microscope
Question 2
When a glass rod is rubbed with a piece of silk cloth the rod :
a) both glass rod and the cloth both acquire positive charge.
b) glass rod becomes positively charged while the cloth has a negative charge.
c) both glass rod and the cloth both acquire negative charge.
d)glass rod becomes negatively charged while the cloth has a positive charge.
An inflated rubber balloon and a woollen cloth are rubbed together. What type of charge is acquired by (a) woollen cloth, and (b) rubber balloon?
Question 1
An electroscope is a device which is used to find if an object is
(a) charged
(b) magnetic
(c) free of cracks
(d) hot
The electric charge, in uniform motion, produces
electric field only
magnetic field only
both ‘a’ and ‘b’
neither ‘a’ nor ‘b’
A body can be negatively charged by
Giving excess of electrons to it
Removing some electrons from it
Giving some protons to it
Removing some neutrons from it
Five Styrofoam balls A, B, C, D, and E are used in an experiment. The following observations were made in this experiment :
I. Ball A repels C and attracts B.
II. Ball D attracts B and has no effect on E.
III. a negatively charged rod attracts both A and E.
Based on the above information, answer the following questions:
The ball B must be
Positively charged
Negatively charged
Neutral
Cant say
An inflated rubber balloon is rubbed with a woollen cloth whereas a ballpoint pen refill is rubbed with a polythene bag. Which of these will get positively charged?
A. Inflated rubber balloon B. Woollen cloth C. Ballpoint pen refill D. Polythene bag
(a) A and B (b) B and C (c) A and D (d) B and D
A glass rod is rubbed with silk. Explain the charging of the glass rod and the silk on the basis of electron movement.
When an object gets negatively charged by the process of friction, then:
(a) the object loses some electrons (b) the object loses some protons
(c) the object gains some electrons (d) the object gains some protons
A palstic comb is rubbed with dry hair whereas a glass rod is rubbed with a piece of silk cloth. Which of these will get negatively charged?
A. Plastic comb B. Glass rod C. Dry hair D. Silk cloth
(a) A and B (b) B and C (c) A and D (d) B and D
Who discovered that the clouds are electrically charged?
Describe a simple experiment using a pith ball electroscope to demonstrate that like charges repel and unlike charges attract each other.
Question 3(b)
State whether the following statement is true or false.
A charged glass rod attracts a charged plastic straw.
If a charged plastic straw is brought near another uncharged plastic straw. what will happen?
An ebonite is rubbed with fur. State the kind of charge acquired by each.
- True
- False
Question 2
When a glass rod is rubbed with a piece of silk cloth the rod :
a) both glass rod and the cloth both acquire positive charge.
b) glass rod becomes positively charged while the cloth has a negative charge.
c) both glass rod and the cloth both acquire negative charge.
d)glass rod becomes negatively charged while the cloth has a positive charge.
The process due to which an uncharged insulated metallic conductor gets electrically charged when held near a charged body is called _____
Five Styrofoam balls A, B, C, D and E are used in an experiment. The following observations were made in this experiment :
I.Ball A repels C and attracts B.
II. Ball D attracts B and has no effect on E.
III. a negatively charged road attracts both A and E.
Based on the above information, answer the following questions :
Ball A must be
positively charged
negatively charged
neutral
cant say
