Unique Academic Board Solutions for Exercise 2: Practice Exercise

In order to make p-type semiconductors, what is mixed with silicon?

Who invented diode-bulb?

The speed of light in water is $\frac{3}{4}$ of that in air. What is the refractive index of water?

A body is floating in water at 4°C. If temperature reaches 100°C, then the body will-

In an earthen pot cooling of water depends upon:

A $100 Watt$ bulb is kept on for a period of $10$ hours per day in the month of September. The electrical energy consumed in that month in kilowatt hours ($kWh$) is-

A stone is dropped in a well and splash is heard after 1.5 seconds after the stone hits the water surface. If the velocity of sound is 327 m/s the depth of the well is?

The two ends of a train moving with a constant acceleration pass a certain pole with velocities u and v, The velocity with which the middle point of the train passes the same pole is-