The motion on a curved path, when one component of velocity is constant and the other is variable is called?
Radian is used to measure
Intensity of Flame
An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is
A body of mass 4 kg is accelerated upon by a constant force, travels a distance of 5 m in the first second and a distance of 2 m in the third second. The force acting on the body is
Pa(Pascal) is the unit for
Two waves are represented by the equations y1 = asin(wt + kx + 0.57)m and y2 = acos(wt + kx)m, where x is in meter and t in s. The phase difference between them is
Consider the following statements : (1) A light and a heavy body, having equal momenta, have equal kinetic energies. (2) The total energy of a body in motion is equal to the work it can do in being brought to rest. (3) A body cannot have momentum when its energy is zero. Which of these statement(s) is/are correct ?
1 and 2
2 and 3
What is the reason to pivot the compass needle on a sharp pin?
To minimise the magnetic effect on the pin
To maximize the magnetic effect on the pin
To minimize the friction between the pin and the compass needle
To ensure that the compass needle will not drop from the pivoted point
Hot water cools from 60°C to 50°C in the first 10 minutes and to 42°C in the next 10 minutes. Then the temperature of the surroundings is _____.
When a body moves with a constant speed in a circle?
Its velocity is uniform
Its acceleration is increasing
Its velocity is changing
Its acceleration is zero
Magnetism at the centre of a bar magnet is
Minimum or maximum
If a rock is brought from the surface of the moon to the earth, then
Its mass will change
Its weight will change but not its mass
Both mass and weight will change
Both mass and weight will remain the same
The magnitude of the gravitational force with which the earth attracts the object of mass M, towards its center, is given by?
F = G M Me / Re2
F = G Me / Re2
F = G2 M Me / Re2
F = G M2 Me / Re2
In Young's double slit experiment, a third slit is made in between the double slits. Then
Intensity of fringes totally disappears
Only bright light is observed on the screen
Fringes of unequal width are formed
Contrast between bright and dark fringes is reduced
The cloudy nights are warmer than clear nights because
Clouds prevent escape of radiation of heat from the ground and the air
Absorb sunlight in the day and radiate the same in night
Clouds make the atmosphere damp and generate heat
Clouds obstruct the movement of air which creates heat
Which one of the following statements is not true for a person suffering from hypermetropia?
The person can see far objects distinctly
The focal length of the lens is large
The image of the close object is focussed behind the retina
A concave lens is used to correct this defect
The weight of a body is the gravitational force exerted on it?
By another body
By the moon
By the planet
By the earth
Who discovered Atom ?
The terminal potential difference of a battery becomes equal to its e.m.f when its internal resistance, is?
Consider the following statements and select the correct code. Assertion (A): A piece of copper and a piece of glass are heated to the same temperature. When touched, thereafter, the copper piece appears hotter than the glass piece. Reason (R): The density of copper is more than that of
Both A and R are true and R is the correct explanation of A
Both A and R are true, but R is not the correct explanation of A
A is true, but R is false
A is false, but R is true
A plane mirror is approaching you at a speed of 10 cm/s you can see your image in it. At what speed will your image approach you?
The horizontal distance from the origin (x=O, y=O) to the point where the projectile returns (x = R, y=O) is called?
Maximum height of the projectile
Trajectory of the projectile
Vertical component of the projectile
Range of the projectile
Hydrogen atom does not emit X-rays because
It contains only a single electron
Energy levels in it are far apart
Its size is very small
Energy levels in it are very close to each other
Atom is the smallest part of matter which takes part in chemical reactions.
Rectifiers are used to convert
Direct current to Alternating current
Alternating current to Direct current
high voltage to low voltage
low voltage to high voltage
An endoscope is used by a physician to view the internal parts of a body organ. It is based on the principle of
Refraction of light
Reflection of light
Total internal reflection of light
Dispersion of light
The mass of earth is?
ME = 9.98 x 1024 Kg
ME = 6.98 X 1024 Kg
ME = 5.98 X 1024 Kg
ME = 7.98 X 1024 Kg
What is the maximum value of deforming force upto which a material shows elastic property and above which the material loses it ?
The following observations were taken for determining surface tensiton T of water by capillary method : Diameter of capilary, D = 1.25 × 10–2 m rise of water, h = 1.45 × 10–2 m Using g = 9.80 m/s2 and the simplified relation T = rhg × 103 N/m, the possible error in surface 2 tension is closest to :
The most stable particle in Baryon group is
Omega - particle
Lamda - particle
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