Explore topic-wise InterviewSolutions in Current Affairs.

Pieces of ice added to a drink cool it much faster than ice cold water added to it because

The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? (Assuming that the near point of a normal eye is 25 cm)

We know light gets scattered when it enters the Earth's atmosphere. Why do clouds appear white rather blue?

The area of a circle is $\pi a^2$, then the radius of the circle is ____.

The radius of a normal human eyeball is ______ .

Give reasons:

(1) You cannot enjoy watching a movie from a very short distance from the screen in a cinema hall.

(2) A simple microscope is used by watch repairers.

(3) A concave lens is used to correct myopia.

(4) In gold age bifocal lens is necessary for some person.

(5) Concave mirrors are used in solar devices.

The weight of any person on the moon is about $\frac{1}{6}$ times that on the Earth. He can lift a mass of 15 kg on the Earth. What will be the maximum mass, which can be lifted by the same force applied by the person on the moon?

A 100 Watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.

A wire of resistance $R$ is divided in $10$ equal parts. These parts are connected in parallel, the equivalent resistance of such connection will be

If two points are maintained at $5V$ each and a resistor of $10\Omega$ is connected across them, what is the current across them?

Describe the mechanism of focusing the image of a distant object in your eye when you raise your head after reading a book.

The equivalent resistance between (a) & (b) in the circuit can be obtained by the expression:

The figure shows four magnet bars hung from a wooden stick. The ends of each bar magnet are labelled as shown.
Which of the following diagrams shows a possible arrangement of the three magnets?

Which of the following property of a proton can change while it moves freely in magnetic field?

Electric field at a distance $x$ from origin is given as $E=\frac{100}{x^2}\text{N/C}$, then the potential difference between the points situated at $x=10\text{m}$ and $x=20\text{m}$ is

If a wire of resistance $10\Omega$ is cut along its length such that its diameter becomes half then what will be the new resistance?

Two oscillating systems; a simple pendulum and a vertical spring - mass - system have same time period of motion on the surface of the Earth. If both are taken to the moon, then

Which of the following are not the mobile charge carriers in a conductor?

Rakesh has to reach school by $9AM$. If he observes the sunrise at $5:58AM$. What amount of the time he has left to reach school from actual sunrise ?

If $E$ is the emf of a cell of internal resistance $r$. It is connected with an external resistance $R$, then potential difference across $R$ is given as