A plastic 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?
Plastic comb
Glass rod
Dry hair
none of the above
Earthing is provided in building to protect it from:
lightning
leakage of electric current
cyclone
thunderstorm
Earthquake at two places A and B were measured by a seismograph which recorded the magnitude as 2 and 4. The magnitude of tremors and its destructive energy at A and B can be compared us under:
Tremor at B are two times that at place 'A'
Tremor at B are four times that at place 'A'
Tremor at B are 100 times that at place 'A'
Tremor at B are 1000 times that at place 'A'
During the formation of rain, when water vapour changes back to liquid in the form of rain drops:
heat is absorbed
heat is released
heat is first absorbed and then released
there is no exchange of heat
When an object gets negatively charged by the process of friction, then:
the object loses some electrons
the object loses some protons
the object gains some electrons
the object gains some protons
Electroscope is used:
to detect and test small electric charges
to calculate the amount of electric charge flowing through the conductor in the given interval of time
to find out the presence of antimatter
to test the presence of magnetic field
An earthquake of magnitude 2 on Richter scale is:
two times as strong as an earthquake of magnitude 1
four times as strong as an eartquake of magnitude 1
ten times as strong as an earthquake of magnitude 1
hundred times as strong as an earthquake of magnitude 1
When a glass rod is rubbed with silk cloth, it acquires ................ charge because ........... are removed from it.
Which information completes the given statement?
Positive, electrons
Positive, protons
Negative, electrons
Negative, protons
Electrical charge can be transferred from a charged object to another through
Insulator
Conductor
Vacuum
Air
Study the given statements.
I. Lightning and sparks from woollen clothing are essentially the same phenomena.
II. Charge acquired by a glass rod when it is rubbed with silk is called negative charge.
III. When you rub a plastic scale on your dry hair, it acquires a charge.
IV. Static charges are called so, because they do not move by themselves. Which of the given statements are correct?
I and II only
I and III only
I, II and III only
I, III and IV only
