Q.1
The weakest of all fundamental forces is
Q.2
Fish and other aquatic creatures can live inside a deep frozen pond because
Q.3
The density of a gas is maximum at
Q.4
The unit of force is a
Q.5
Atmospheric pressure exerted on earth is due to
Q.6
The speed of light will be minimum while passing through
Q.7
The force which makes a vehicle to stop when break is applied is called
Q.8
The rate of flow of electric charge is measured in
Q.9
A device which is used to limit the current in an electrical circuit is called a
Q.10
Ohm's law is valid in case of
Q.11
Electrical burns occur principally because of
Q.12
Lakes freeze in cold countries in winter, leaving the water underneath at
Q.13
A bimetal made copper and iron strips welded together is straight at room temperature. It is held vertically with iron strip towards left and copper strip towards right. If this bimetal is heated, it will
Q.14
What is the SI unit of Force?
Q.15
What measures Air pressure?
Q.16
Materials that allow electricity to flow are called
Q.17
The fundamental scientific principle in the operation of battery is
Q.18
The SI unit of resistance is:
Q.19
Electrical Energy is the energy of
Q.20
Thermal expansion of materials arises from
Q.21
If a band is played on the moon the sound will
Q.22
The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?
Q.23
The velocity of sound in air
Q.24
The rice is cooked more quickly in a pressure cooker because
Q.25
If the current flowing through a circuit is 0.6 A for 6 mins, the amount of electric charge flowing through it is ________
Q.26
As water is cooled from 4 deg C to 0 deg C, its density
Q.27
For which of the following substances, the resistance decreases with increase in temperature?
Q.28
The S.I. unit of electric charge is :
Q.29
The colours of stars depend on their
Q.30
The substance which conducts current in the solid state is
Q.31
Infrasonic sound has a frequency lower than
Q.32
When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to :
Q.33
Quality of a musical note depends on
Q.34
Hertz is the SI unit of
Q.35
What is the SI unit of intensity of sound?
Q.36
Sound cannot pass through
Q.37
Indicate the false statement about the resistance of a wire
Q.38
The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
Q.39
Electric current is measured by which instrument?
Q.40
Noise is measured in
Q.41
Sound following a flash of lightning is called
Q.42
Acceptable noise level for human ear
Q.43
The velocity of the sound is highest in
Q.44
The ordinary and maximum tolerance limit of sound by human being is
Q.45
Ocean currents are an example of
Q.46
The quality or tone of a musical sound produced by a stringed instrument depends on
Q.47
What is the SI unit of electric current?
Q.48
Man perceives sound vibrations in the frequency ranges of
Q.49
Instrument used to study the behaviour of a vibrating string is :
Q.50
Among the following materials sound travels fastest in
0 h : 0 m : 1 s