If we add all the 7 colours of rainbow (red, yellow, blue, green, orange, violet and indigo), the resultant colour would be?? Black White Dark Blue None of these
The vector ‘ i + k ‘ is perpendicular to:? i – j j – k 2k – 2i None of these
cos@(1+tan@) is a(an)? Null Vector Unit Vector Direction cosines None of these
It is easier to roll a stone up a sloping road than to lift it vertical upwards because? work done in rolling is more than in lifting work done in rolling a stone is less than in lifting it work done in lifting the stone is equal to rolling it work done in both is same but the rate of doing work is less in rolling
A block of weight W is pulled a distance S along a horizontal table. the work done by the weight is?? WS zero WS/g WSg
According to second condition of equilibrium, for a system to be in rotational equilibrium, the torques acting on it must balance. This is true only if the torques are taken about:? the center of the system the center of mass of the system any point of the system outside it None of these
Which of the following is a scalar quantity?? Electric field Angular Velocity Retardation None of these
If d is measured to be 10 cm, and it is measured with the help of an instrument having least count of 0.1 cm. Determine the absolute uncertainty?? 0.1 0.1% 5 % None of these
Which of the following is correct?? Impulse has the same dimension as that of ratio of work done to velocity Force applied is equal to the change of momentum In an adiabatic process, heat is exchanged between system and the surrounding. Dimensional analysis helps in deriving the formulas, including trigonometric functions too.
A football is kicked with an angle θ w.r.t horizontal, the acceleration of projectile at highest point is:? Equal to time rate of velocity value at the highest point. Zero Both (A) and (B) None of these
What is the shape of velocity time graph for constant acceleration?? straight line inclined in xy plane straight line parallel to x axis straight line parallel to y axis None of these
How many forces are acting on Air-craft in air? (assuming , un-accelerated, straight-and-level flight)? One Two Three Four
For an air-craft to accelerates:? Drag force > Thurst Thurst > Drag force Thurst = Drag force None of these
Mirage is:? unequal heating of different parts of the atmosphere depletion of ozone layer in the atmosphere equal heating of different parts of the atmosphere None of these
Recoiling of a cannon after firing a shot is an example of:? Newton’s 1st Law Newton’s 2nd Law Newton’s 3rd Law None of these
An electric bulb lights out for 60 minutes daily. If the cost of electricity is 10 rupees per unit, and the total cost for a month of 30 days is 100 rupees, determine the Power of bulb?? 10 watt 100 watt 1000 watt None of these
A football is kicked at 45 degree, the maximum height attained by the football is 100m. What will be the range ofr the football?? 50m 100m 200m 400m
An object is at infinite height w.r.t earth, the? Absolute P.E. of the object is taken as zero Absolute P.E. is maximum at this infinite height Both (A) and (B) None of these
The ratio of orbital velocity to the escape velocity is:? 1: √2 √2 : 1 1 : 1 None of these
watt-hour is a unit of? Power Energy Intensity Does not represent a physical quantity.
