Physics MCQ series - 10

91:  The Millikan experiment showed that electric charge was:

w) Negative

x) Quantized

y) Positive

z) unmeasurable

ANSWER:    X – QUANTIZED

92:  When a metal becomes a superconductor, there is a tremendous decrease in it’s:

w) Total volume

x) Electrical resistance

y) Length

z) Density

ANSWER:    X -- ELECTRICAL RESISTANCE

93:  An x-ray photon collides with a free electron, and the photon is scattered.  During this collision there is conservation of:

w) Momentum but not energy

x) Neither momentum nor energy

y) Energy but not momentum

z) Both momentum and energy

ANSWER:    Z -- BOTH MOMENTUM AND ENERGY

94:  In the sun, helium is produced from hydrogen by:

w) Radioactive decay

x) Disintegration

y) Fission

z) Fusion

ANSWER:    Z – FUSION Science Bowl PHYSICS

95:  The half-life of an isotope of an element is 5 days.  The mass of a 10 gram sample of this isotope remaining after 20 days is:

w) 0.312 grams

x) 0.625 grams

y) 1.25 grams

z) 2.50 grams

ANSWER:    X -- 0.625 GRAMS

96:  The idea that electrons revolved in orbits around the nucleus of an atom without radiating energy away from the atom was postulated by:

w) Thompson

x) Bohr

y) Rutherford

z) Einstein

ANSWER:    X – BOHR

97:  Alpha particles are nuclei of:

w) Hydrogen

x) Helium

y) Oxygen

z) Nitrogen

ANSWER:    X – HELIUM

98:  A ball falling vertically from rest for 3 seconds travels very nearly:

w) 14.7 meters

x) 29.4 meters

y) 44.1 meters

z) 88.2 meters

ANSWER: Y -- 44.1 METERS Science Bowl PHYSICS

99:  A car is moving along a straight horizontal road at a speed of 20 meters per second.  The brakes are applied and a constant force of 5000 Newtons decelerates the car to a stop in 10 seconds.  The mass of the car is:

w) 1250 kilograms

x) 2500 kilograms

y) 5000 kilograms

z) 10,000 kilograms

ANSWER:  X -- 2500 KILOGRAMS

100:  A girl throws a 0.1 kilogram ball at a wall.  The ball hits the wall perpendicularly with a velocity of 5 meters per second and then bounces straight back with a velocity of 4 meters per second.  The change in the momentum of the ball is:

w) 0.1 kilogram-meters per second

x) 0.4 kilogram-meters per second

y) 0.5 kilogram-meters per second

z) 0.9 kilogram-meters per second

ANSWER:  Z -- 0.9 KILOGRAM-METERS PER SECOND

Share on Google Plus

About R.Parththipan

This is a short description in the author block about the author. You edit it by entering text in the "Biographical Info" field in the user admin panel.