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In half-wave rectifier, what is the output frequency if the input frequency is 40 Hz. What is the output frequency of a full-wave rectifier for the same in...
In an n-type silicon, which of the following statements is true:
When a forward bias is applied to a p-n junction, it
The refractive index of glass is 1.5. What is the speed of light in glass? Speed of light in vacuum is 3.0 x 108 m/s.
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? ...
A rocket with a lift-off mass 10,000 kg is blasted upwards with an initial acceleration of 5.0 m s–2. Calculate the initial thrust (force) of the blast. ...
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....
What is the focal length of a double convex lens for which the radius of curvature of each surface is 30 cm and the refractive index of glass is 2.50 ?
Specific heat of aluminum when 26000 J of energy is supplied to 4 kg block and it's temperature rises from 25°C to 35°C is
________ 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'...
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 –
The base of an electric iron is brightly polished mainly -
Lux is the SI unit of -
Pycnometer is an instrument used to measure the –
Rain drops acquire spherical shape due to -
What is found in frequency modulation?
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