List of practice Questions

If a p-n junction diode is forward biased, then:
Young's modulus and shear modulus are applicable for:
Find the magnetic field inside a solenoid having number of turns 7000, length 1m, and current 1 A.
The force between two point charges separated by a distance \(d\) is \(F\). If one charge is moved away by a distance \(d\), then the new force is:
Specific heat capacity of diatomic gas at constant volume:
Find the frequency of the waveform shown in the graph.
Find the magnification of a lens having focal length 5 cm (Least distance of distinct vision = 25 cm).
If \(T\) and \(n\) are surface tension and coefficient of viscosity, if temperature increases, then:
Moment of inertia of a disc about the axis passing through the center and perpendicular to the plane is \(I_1\). What is the moment of inertia about its diameter?
A wire of length 1m is clamped at half of its length. If the fundamental frequency is 3kHz, then find the velocity.
Forces acting on 2 bodies of masses 2kg and 3kg are same. What is the ratio of their acceleration?
Monochromatic light passing through a prism doesn't produce:
What is the speed of water flowing through a hole located at a depth \(h\) from the surface of water in a tank?
Energy dissipated per unit time by a wire of resistance \(2R\) connected to a 2V battery.
Area under \(F\) and \(t\) graph is?
Vibration of atoms and molecules produce electromagnetic radiation in the region of:
A ball of mass 10g is dropped from a height of 50m. If 30J energy is lost due to air resistance, then what is the velocity of the ball when it hits the ground?
A lift having mass 1000kg moves upward against a frictional force of 2000N. Power given by motor is 36000W. What is the velocity of the lift?
If the threshold wavelength of a metal is in the green light region, then which of the following radiation cannot cause emission of electrons from metal?
Relation between \(C_p\), \(C_v\) and \(R\)
Product of uncertainty in position (\(\Delta x\)) and uncertainty in velocity (\(\Delta v\)) has unit:
A coil of length \(l\) and area of cross-section \(A\) has resistance \(R\). If the length is increased to 3 times and area decreases to \(A/3\), then the new resistance is:
A body starts from rest and moves with an acceleration of \(2 \, \text{m/s}^2\) and comes to rest with a retardation of \(2 \, \text{m/s}^2\). Find the distance travelled?
Highest limiting conductance at 298 K is:
A subatomic particle of mass \(2.2 \times 10^{-28}\) kg. Velocity = \(3 \times 10^5 \, \text{ms}^{-1}\). De Broglie wavelength?