All electrical appliances are connected in parallel to each other between the main line and the neutral wire to get?
On a stationary sail boat, air is blown from a fan attached to the boat. The boat
A body released inside the spacecraft does not fall relative to it, and it appears to be?
Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open
Consider the following statement:
The principle of total internal reflection is
applicable to explain the
1. Formation of mirage in desert.
2. Formation of image in microscope.
3. Colour of evening sky.
4. Operation of optical fibres.
Which of the statement given above are correct?
If escape velocity from the earth’s surface is 11.2 km/sec. then escape velocity from a planet of mass same as that of earth but radius one fourth as that of earth is
Rectifiers are used to convert
The force which opposes the relative motion between different layers of liquid or gases is called
A beam of parallel rays is brought to a focus by a plano-convex lens. A thin concave lens of the same focal length is joined to the first lens. The effect of this is _______.
For one complete revolution θ =?
On a rainy day, small oil films on water show brilliant colours. This is due to
The distance between centre of the earth and moon is 384000 km. If the mass of the earth is 6 ´ 1024 kg and G = 6.66 ´ 10-11 Nm2/kg2. The speed of the moon is nearly
A prism having refractive index 1.414 and refracting angle 30° has one of the refracting surfaces silvered. A beam of light incident on the other refracting surface will retrace its path, if the angle of incidence is ______.
Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?
What is the correct sequence in which the lengths of the following units increase?
1. Angstrom
2. Micron
3. Nanometer
Select the correct answer using the codes given below:
Newton apply Huygens’s formula to calculate?
A car is moving on a road and rain is falling vertically. Select the correct answer
The mean radius of the earth is R, its angular speed on its own axis is w and the acceleration due to gravity at earth’s surface is g. The cube of the radius of the orbit of a geo-stationary satellite will be
Minimum number of unequal vectors which can give zero resultant are
Refractive index of an optical medium chan geswith
1. the nature of the medium.
2. the change in the angle of incidence of the ray.
3. colour of the incident ray.
Select the correct answer using the code given below:
Thomas Alva Edison invented
If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same
Two cells each of emf E and internal resistance r are connected parallel across a resistor R. The power dissipated in the resistor is maximum if
Electronic motors operating at low voltages tend to burn out because
Blue colour of sea water is due to
Who among the following first gave the experimental velocity of G?
Magnetic resonance imaging is based on the phenomenon of
Which unit we use to express Nuclear sizes ?
The acceleration of the moon is because of the?