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An object is placed at the center of curvature of a concave mirror. What will be the distance between its image and the pole?
Due to what is the human eye able to focus on objects at different distances by adjusting the focal length of the eye lens?
Which of the following is the The formula of potential difference?
Which of the following is an example of non-ohmic reistance ?
Who discovered the law of force that governs the force between two electric charges?
What is the main constituent of CNG?
Which of these are the harmful radiations emitted by the sun?
What is the imaginary line passing through the center of curvature and the pole of the mirror called?
What will happen to a ray of light when it travels in air falls obliquely on the surface of calm pond?
Always > 1
Always < 1
Always = 1
None of these
To which of the following is resistance inversely proportional to?
What is the minimum wind speed required for wind electric generators to work properly?
1.5 km / h
15 km / h
150 km / h
1500 km / h
As the temperature of metallic resistor is increased, what will happen to the product of its resistivity and conductivity?
In a circuit containing the unequal resistors connected in parallel, what will be the voltage drop across both the resistance ?
What is the maximum temperature that can be attained in a box-type solar cooker ?
A student sitting on the last bench can see letters written on the board but is unable to read the letters written in his textboook. What is he suffering from?