The relation between thrust (T), pressure (P) and area (A) of an object in a given medium is __________.
T = P × A
The correct answer is option 3 i.e. T = P × A.
What happens when we increase the temperature of solids?
Which gas is passed through calcium hydroxide to form calcium carbonate and water?
A cubic wooden block of side 2 m is lying on a tabletop. If the mass of the wooden block is 10 kg‚ then the pressure exerted by the wooden block on the tabletop is: (consider g = 10 m/s2)
When a thick glass slab is placed over printed matter, they appear to be ________ and this is due to ________ of light.
The pattern of the magnetic field lines produced by a current-carrying conductor :
Which of the following is the unit of acceleration?
An object is placed of 20 cm in front of a concave mirror and its image is formed at a distance of 60 cm on the same side as the object. The magnification produced by the mirror will be:
A ball of mass 0.5 kg is thrown vertically upwards and rises to a height of 20 m. The initial velocity of ball is:
(Consider g=10 m/s2)
If the length of a conductor is tripled, keeping other factors same, the rersistance of the conductor will be:
For current carrying circular loop, the field strength is :
What is the colour of the light emitted by the Sun?
Lightning occur in the sky when two clouds:
With reference to street-lighting, how do sodium lamps differ from LED lamps?
1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.
2. As street lights, sodium lamps have a longer life span than LED lamps.
3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street lighting.
Select the correct answer using the code given below.
Which one of the following is a reason why astronomical distances are measured in light-years?
In a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following?
1. Area of the hole in the lid
2. Temperature of the flame
3. Weight of the lid
Select the correct answer using the code given below.