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WorksheetsPhysics Final Revision
Total questions: 25
Worksheet time: 29mins
The pitch of a flute is decreased by (a) the length of air column.
Write decreasing / increasing/ keeping same
A tuning fork produces sound of __________ frequency
single
double
infinite
three
Like charges (a) and unlike charges attract.
An ebonite rod when rubbed with fur acquires the ___________ charge.
positive
negatve
neutral
zero
Boiling occurs at _________.
all temperatures
a fixed temperature
very high temperature
very low temperature
Cooling is produced in (a) .
If a drum is beaten hard its loudness (a) .
Write
increases/ decreases / remains same
The time period of a wave is 10 seconds. Its frequency is (a) Hz
Solids expand (a) than the liquid.
Write more / less / same as
The molecules of a liquid (a) heat from surrounding in evaporation.
1 kilowatt hour = __________ joule.
3.6
3.6 X 106
3.6 X 10-6
3.3 X 106
The pitch of a stringed instrument is increased by _______ tension in string
increasing
decreasing
keeping same
first increasing then decreasing
Smaller the membrane (a) is the pitch.
Write higher / lower / same
When a charged conductor is brought in contact with disc of a gold leaf electroscope its leaves (a) .
A glass rod rubbed with silk (a) an ebonite rod rubbed with fur.
Write attracts/ repels / no change
In a longitudinal wave , (a) and rarefactions are formed.
A fuse wire has a (a) melting point.
Write high or low.
The number of electrons and (a) in an atom are same. So atom is electrically neutral.
Decibel is the unit of (a) of a sound.
Evaporation is (a) on a wet day.
Write rapid / slow
An electrical appliance is rated as 50 W – 200 V.
How much current will flow through the appliance when in use?Current = (a) A
An electric heater is rated 1.5 kW, 250 V. Find the safe current which can flow through it. What is safe current.
Safe Current = (a) A
Two waves have frequencies 128Hz and 512 Hz but same amplitude.
Compare their (i) loudness (ii) pitch ?
1:1 and 1:2
1:2 and 1:1
1:1 and 1:1
1:2 and 1:2
Assuming the electric consumption per day to be 6 kWh and the rate of electricity to be Rs. 10, find how much cost is to be paid in a month of 30 days?Ans : Rs. (a)
Two waves of the same pitch have amplitudes in the ratio 1:3. What will the ratio of their
(i) loudness (ii) frequency ?
1:9 and 1:3
1:9 and 1:1
1:3 and 1:1
1:1 and 1:9
