PHYSICS QUIZ

A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be

5 R/4

R/5

4 R/5

5 R

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YOUR ANSWER : ?

Which planet has the lowest density?

Earth

Saturn

Neptune

Jupiter

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Which of the following property of sound is affected by change in air temperature?

Intensity

Amplitude

Frequency

Wavelength

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The velocity of falling rain drops attains a terminal value because of

Viscous force exerted by air

Air current

Upward thrust due to air

Surface tension

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Stars appears to move from east to west because

The earth rotates from west to east

The earth rotates from east to west

All stars move from east to west

The background of the stars moves from west to east

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following events occurred first ?

Max Planck unveiled the Quantum Theory

Albert Einstein propounded the General Theory of Relativity

Madame Marie Curie became the first woman Nobel Prize winner

Marconi first tranmitted a wireless signal

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Which is a correct way to measure wavelength?

Nearest peak to nearest trough

Nearest trough to peak

Nearest peak to peak

None of these

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The centre of gravity of a sprinter during the race lies

At the centre of the body

Behind his feet

To the left side of the body

Ahead of his feet

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According to the quantum theory of light, the energy of light is carried in discrete units are called

Protons

Electrons

Photoelectrons

Photons

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What is unit of Viscosity ?

Newton second per square meter

Coulomb

Watt per meter per degree celcius

Joule per kilogram per Kelvin

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