The resistance of a conductor is said to be 1 ohm if
Apply Ohm’s law V = IR. Thus, R = V/I = 1V/1A = 1Ω
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The image formed by a convex lens is observed to be virtual, erect and larger than the object. Then the position of the object should be
If the object is placed between the pole and focus, then the image formed will be virtual, erect and enlarged.
A lens which forms a virtual and enlarged image is
An only convex lens forms an enlarged and virtual image of an object when the object is placed at the... View Article
Where should an object be placed in front of a convex lens to get a real image of the size of the object?
Answer: At twice the focal length, the image formed by the convex lens is real and of the same size... View Article
Parallel light rays appear to pass through _________ after refraction from concave lens
Parallel light rays appear to pass through focal point after refraction from concave lens
Which lens always forms diminished and erect image?
A concave lens always forms diminished and erect image no matter where the object is placed.
Choose the right answer from the following
When the object is placed beyond 2F in front of a convex lens, the image is formed _____. between F... View Article
Simple barometer was invented by
Evangelista Torricelli was the inventor of the barometer. A barometer is a device which is used for the measurement of... View Article
Concave Lens Question
The image formed by a concave lens is seen to be virtual, erect and highly diminished than the object. What... View Article
1 kilowatt-hour is equal to
1 kWh = 1000 J/s × 60 × 60 seconds = 3.6 × 106 J
If four resistors, each of the value 0.5 ohm are connected in series, then the total resistance of the circuit is
In series combination: Resistance- R = R1+ R2 + R3 + R4 = 0.5 Ω + 0.5 Ω + 0.5... View Article
If relative density is 11.3, the density of the substance in SI units is
relative density = density of material / density of water And density of water = 103 kg/m3
The weight of water displaced by an iron object is 10 kg. The buoyant force acting on the iron object is
The buoyant force acting on iron object will be equal to the weight of the iron object. Thus, W =... View Article
An object of weight 500 N is floating in a liquid. The magnitude of buoyant force acting on it is
An object floats in a liquid if it receives equal and opposite upward force called buoyant force from the liquid.... View Article
Which principle tells us about the decrease in weight of a body when immersed in a liquid?
Archimedes’ law explains that a buoyant force acts on an object immersed in the fluid. Archimedes principle states that when... View Article
Which of these quantity is inside the lens?
Optical centre is the centre of lens, and hence is inside the lens.
Apparent loss in weight is caused due to
Due to the upward thrust exerted by the liquid, there is an apparent loss in weight of the body.
What are the uses of objective lens in microscope?
Convex lens is a converging lens, that is, the light rays converge at a point when they pass through it.... View Article
What is a Prism?
In optics, a prism is a transparent optical element with a flat polished surface that refracts light. Prisms can be... View Article
Which one of the following is the use of concave lens? a) magnifying glass b) optical instruments. c) in theatre spotlights d) all of the above
A concave lens is used in optical instruments. In other mentioned options, a concave lens is not used. Uses A... View Article
