Physics
If the phase difference between two points is 120° for a wave with velocity of 360 m/s and frequency 500 Hz, then path difference between the two points is

24 cm
12 cm
1 cm
6 cm

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Physics
A balloon filled with hydrogen will

Reach a particular height and remain floating
Continue going upwards uninterrupted
Burst after reaching some height
Reach a particular height and start coming down

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Physics
The nature of fuse wire is

High resistance and low melting point.
High resistance and high melting point.
Low resistance and low melting point.
Low resistance and high melting point.

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