Category: 4. Patwari (HP), JBT (HP)

In a circuit, the “path” must be complete for A Light to scatter B Heat to vanish C Sound to

In a simple dry cell, chemical energy mainly changes into A Heat energy B Light energy C Electrical energy D

A tuning fork touches a table and sounds louder mainly because the table acts as A Heat source B Vacuum

When a school bell rings, the sound is made because the bell A Gets heated B Absorbs light C Vibrates

A tuning fork touching water shows sound is due to A Light reflection B Heat transfer C Mechanical vibration D

Sound is produced when an object A Melts slowly B Changes color C Vibrates continuously D Becomes heavy Explanation Sound

Which action directly produces sound in most cases? A Heating objects B Melting solids C Vibrating a source D Reflecting

A student reads comfortably at 30 cm, but at 10 cm the letters blur quickly; which eye action fails first

A student shifts focus from a far blackboard to a nearby notebook; which change happens inside the eye to focus

The transparent front part that gives most of the eye’s focusing power is the A Iris B Cornea C Retina