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Basic Physics - Test 1


1. When a uranium nucleus undergoes fission, the energy released is primarily in the form of:

    A. gamma radiation.
    B. kinetic energy of fission fragments.
    C. kinetic energy of ejected neutrons.
    D. all are equal.


2. Compared with a stationary fire engine, the sound you hear when it approaches you has an increased:

    A. speed.
    B. frequency.
    C. velocity.
    D. periodicity.


3. A capacitor loses half its charge every second. After five seconds its charge is q, what was its initial charge?

    A. 4q.
    B. 8q.
    C. 16q.
    D. 32q.


4. Any atom that emits an alpha particle or beta particle:

    A. becomes an atom of a different element, always.
    B. may become an atom of a different element.
    C. becomes a different isotope of the same element.
    D. increases its mass.


5. The red glow in the neon tube of an advertising sign is a result of:

    A. fluorescence.
    B. incandescence.
    C. polarization.
    D. de-excitation.


6. When an increase in speed doubles the kinetic energy of a moving body, its momentum:

    A. increases, but less than doubles.
    B. doubles.
    C. more than doubles.
    D. depends on factors not stated.


7. The speed of sound in air depends on:

    A. frequency.
    B. wavelength.
    C. air temperature.
    D. your ears.


8. During the time an aircraft produces a sonic boom, the aircraft is:

    A. breaking the sound barrier.
    B. pulling out of a subsonic dive.
    C. flying faster than sound.
    D. each of these produces a sonic boom.


9. A ball of mass m is tossed to a height of 20 m. At the 10-m position, half way up, the net force on the ball is:

    A. 2mg.
    B. mg.
    C. mg/2.
    D. mg/4.


10. A rainbow is formed due to:

    A. absorption of sunlight in minute water droplets.
    B. diffusion of sunlight through water droplets.
    C. ionisation of water deposits.
    D. refraction and reflection of sunlight by water droplets.












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