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'
Suppose you are in a car and it is raining heavily with thunderstorms. Then what is the best way to protect yourself from a possible thunder storm fall?
remain in the car
get out of the car and take cover under the car
run to a nearby tree
get out and stand under an electric pole
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?
Inflated rubber ballon
Woollen cloth
Ballpoint pen refill
Polythene bag
Which of the following materials is used to make lightning rods?
Copper
Plastic
Bakelite
Sand paper
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
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
Which of the following will rise the highest?
Air at 100C
Air at 400C
Air at 200C
Air at -50C
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
The device used for detecting charge (positive or negative) on an object is called:
stethoscope
telescope
kaleidoscope
electroscope
A lightning conductor installed in a building:
does not allow the lightning to fall on the building
repels the lightning
forces the lightning to fall in an area where there are no buildings
conducts electric charge to the ground when lightning strikes the building