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Practice Physics GS Questions and Answers

When a forward bias is applied to a p-n junction, it
The storage battery of a car has an emf of 15 V. If the internal resistance of the battery is 0.5 Ω, what is the maximum current that can be drawn from th...
A battery of emf 12 V and internal resistance 4 ohm is connected to a resistor. If the current in the circuit is 0.6 A, what is the resistance of the resis...
A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2 A which settles after a few seconds to a steady value of 2.8 A...
Is Ohm’s law universally applicable for all conducting elements?
In circular motion the direction of velocity changes at _______ points.
...
A constant retarding force of 20 N is applied to a body of mass 10 kg moving initially with a speed of 12 m s–1. How long does the body take to stop? ...
Two billiard balls each of mass 0.02 kg moving in opposite directions with speed 5 m s−1 collide and rebound with the same speed. What is the impulse imp...
If a medium has a critical angle for total internal reflection from the medium to vacuum as 90°, what is the velocity of light in the medium? (Take c = 3....
________ are the elements of group 18.
What is the momentum of an object of mass 1/2 m, moving with a velocity of 2V?
Going from fluorine to chlorine, to bromine and then to iodine, the electro negativity:
Which of the following does not affect the value of acceleration due to gravity?
If the distance between two consecutive crests is L, then the wavelength is given by______.
Which one of the following is the equation for Velocity Time relation?
If an agent does a work 'W' in time 't', then the power is given by:__________.
A porter lifts luggage of 20 kg from the ground and puts it on his head 2 m above the ground. Calculate the work done by him on the luggage (take g = 10ms-...
__________ is the metal used for making the filament of the light bulb.
The mass and energy equivalent to 1 a.m.u. respectively are -
A spherical ball made of steel when dropped in mercury container will –
Gamma rays have greatest similarity with –
In the absence of ozone layer, which rays will enter into atmosphere?
An object at rest will remain at rest and an object in motion will remain in motion until and unless it is acted upon by an external force. This is Newton'...
Cathode rays when obstructed by metal cause emission of -
Tape recorder should not be kept near one of the following things –
The surface tension of water on adding detergent to it –
In a refrigerator, the cooling system should always be –
Pycnometer is an instrument used to measure the –
Rain drops acquire spherical shape due to -
What is found in frequency modulation?
When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance?
Ultra violet radiations of the Sun do not reach the earth because, earth's atmosphere is surrounded by –
Energy that is produced commercially from coal is called –
Which among the following is not a characteristic of transition metals?
Which one of the following is not a function of the liver?
A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be -...
The term ‘Isoneph' indicates the lines of equal –
A decibel is –
If lift is going up with acceleration, the apparent weight of a body is -

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