List of top Physics Questions

If two electromagnetic waves with electric fields given by $$ \vec{E_1} = E_0 \sin (kx - \omega t) \hat{j} $$ and $$ \vec{E_2} = E_0 \sin (kx - \omega t + \pi) \hat{j} $$ - interfere, then the peak value of the electric field of the resultant wave is
Torque on a coil carrying current \( I \) having \( N \) turns and area of cross section \( A \) when placed with its plane perpendicular to a magnetic field \( B \) is:
Isotones have the same number of
Which of the following is not a characteristic of LED?
Which of the following should not be the characteristic of the solar cell material?
In Zener diode, for currents greater than the knee current, the v-i curve is almost
Which of the following is a stable nucleus?
Which of the following regions does X-ray lie between?
Which radiations will be most effective for the emission of electrons from a metallic surface?
A convex lens of focal length $ f = 20 \, \text{cm} $ is combined with a diverging lens of power 65 D. The power and the focal length of the combination is
According to the thin lens formula, which one of the following is true regarding the focal length of the lens?
If the separation between the two slits in Double Slit Fraunhofer Diffraction is changed, what change will be observed in the diffraction pattern?
What happens to the kinetic energy of the emitted electrons when the light is incident on a metal surface?
Which element of the light microscope is in charge of regulating the amount of light that enters the viewing area?
A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then what is its focal length?
Which of the following is a necessary condition for total internal reflection?
Multimode graded index fibers are manufactured from materials with ______.
Which of the following can be used to produce a propagating electromagnetic wave?
Which of the following cannot travel in vacuum?
Which type of transmission line accepts the Transverse electromagnetic wave?
Which of the following statement is valid?
Find the force due to a current element of length 2 cm and flux density of 12 tesla. The current through the element will be 5A.
_______ the resonant frequency, the current in the capacitor leads the voltage in a series RLC circuit.
How is a galvanometer converted into an ammeter?
If a coil carrying current is placed in a uniform magnetic field, then