Physics Test - ...

A body executing S.H.M. has amplitude 5 cm and frequency 5 vibrations per second. Calculate the displacement of particle from mean position after 0.32 s.

Two cylindrical rods of uniform cross-sectional area A and 2A, having free electrons per unit volume 2n and n respectively are joined in series. A constant current I flows through them in steady state. The ratio of drift velocity of free electrons in the left rod to that of the right rod is (VL/VR) is:

A tuning fork vibrates with a frequency of 256 Hz. Taking the speed of sound to be 345.6 m s-1 in the air, find the wavelength and the distance, which the sound travels during the time, fork makes 60 vibrations.

For network shown in figure, determine V₀ and I_D. (Where, I_D = Current flowing in the diodes)

Water is filled up to a height 'h' in a cylindrical vessel. Now, a hole of area 'A' is made at bottom of the vessel. Water drains out of the hole in time 't' seconds. If we repeat the above process with a height of water as '4h', then how much time it require for water to drain out of the cylinder?

[Assume A << A₀ (area of tank)]

If the radius of the earth were to shrink by one percent and its mass remains the same, the acceleration due to gravity on the earth's surface would

Which of the following statement is false for electromagnetic waves ?

A ball is projected up an incline of 30o with a velocity of 30 m s⁻¹at an angle of 30o with reference to the inclined plane from the bottom of the inclined plane. If g=10 m s⁻², then the range on the inclined plane is

Which of the following graphs correctly represent the variation of β=−[(dV/dp)/V] with p for an ideal gas at constant temperature?

In an NPN transistor, the collector current is 10 mA. If 90% of the electrons emitted reach the collector, then the emitter current will be