1571. A material with high elasticity :
A. Does not return to its original shape upon being stretched and other released
B. Return as close as possible to its original shape upon being stretched and then released *
C. Can be stretched to infinite distance
D. None of these
1572. Matter and energy :
A. Can be switched between the two *
B. Converted in all closed system processes when taken together
C. Both A and B
D. None of these
1573. Electric current :
A. Flows downward from a higher potential.
B. Is caused by flow of electrons
C. Both A and B *
D. None of these
1574. Electricity and magnetism are :
A. Two facets of the same force *
B. Always opposed to each other
C. Both A and B
D. None of these
1575. Ball bearings help wheels and other rotating objects :
A. Move without consuming any energy *
B. Rotate with less effort and friction.
C. Both A and B
D. None of these
1576. Photography works by :
A. Keeping a record of the souls of the things being photographed
B. Capturing light reflected from the object being photographed *
C. Both A and B
D. None of these
1577. Arthur C Clarke, the famous science fiction author, while working as a radio operator in the British army in World War II:
A. Proposed using carbon monofilaments to construct a space elevator
B. Postulated the existence of extra-terrestrail artefacts on the moon
C. Proposed using a network of satellites in a stationary orbit around the Earth at very high altitudes to bounce communication signals all over the world *
D. None of these
1578. The sino Pakistan JF-17 thunder aircraft :
A. Is a commercial transport aircraft
B. Isn’t made or put together in Pakistan.
C. Has no stealth features in its engine inlets ore elsewhere *
D. None of these
1579. Communication satellite are in :
A. Geostationary orbit *
B. Geosynchronous orbit
C. Semi-Synchronous orbit
D. None of these
1580. RAM of a computer refers to :
A. Read Access memory
B. Right access memory
C. Random Access memory *
D. None of these