an ammeter
a rheostat
a voltmeter
a voltameter
C. a voltmeter
will increase
will decrease
does not change
varies with the increase of depth of the immersion of the iron piece
Irene Curie
W Bothe and H Becker
James Chadwick
Jean Joliot
protects the article from atmospheric corrosion
gives it a more attractive appearance
Both (a) and (b) above
None of the above
the temperature is low
there is no air
the pressure is low
All the above
Proxima Centauri
Sirius
Aldebaran
Vega
the Sun
the Moon
the Venus
the Mars
10-10 cm
10-12 cm
10-13 cm
10-16 cm
James Clerk Maxwell
Heinrich Hertz
Thomas Alva Edison
Baird
Dalton
Rutherford
Einstein
Planck
same number of protons but different number of neutrons
same number of neutrons but different number of protons
the same total number of protons and neutrons
same number of protons and different number of electrons
watt
degree
joule
erg
the retina of the eye moves forward
the retina of the eye moves backward
c).the iris is unable to dilate the pupil immediately to be able to see things
the eye has no power of accommodation
centrifugal force
frictional force
gravitational force
distillation
taking photos of various objects
recording and reproducing three dimensional images
tracing out planets and stars in the sky
transmitting light waves
enclosing it in a thick walled iron box
wrapping it with an insulator
by placing it inside a glass case
by surrounding it with fine copper gauze
Bernoulli's principle
Magnetic properties of the ship's material
Newton's third law of motion
Earth's gravitational force
1000 km
1500 km
2000 km
500 km
protons
electrons
neutrons
positrons
both pieces will lose their magnetism
one piece will have North Pole on both ends and the other South Pole on its both ends
each will remain a magnet with North Pole at one end and South Pole at the other
the longer piece will behave as a bar magnet while the smaller will have no magnetism at all
electric current - ampere
resistance - Ohm
electric power - volt
electric charge Coulomb
power
kinetic energy
momentum
impulse
Rutherford
Bohr
Henri Bacquerel
Marie Curie
12N
2N
10N
6N
a -rays
� -rays
? -rays
X-rays
for automatically maintaining a steady temperature
for measuring electricity
to reduce the voltage of electricity
for producing heat
the centripetal force
the centrifugal force
the frictional force
All the above
cools the body that transfers it
heats the body that absorbs the heat
may change the physical state of the substance
All the above
Platinum
Tungsten
Nichrome
Copper
radio waves and X-rays
ultraviolet light waves
visible light waves
All the above
nuclear fission
nuclear fusion
chemical combustion
boiling