List of top Physics Questions

The drift velocity of the electron is directly proportional to the:

An electron is projected in a uniform magnetic field along the direction of the field, the electron will experience:

The shortest Wave length in the lyman series of hydrogen spectrum is 912 Å. The shortest wavelength present in paschen series of spectral lines will be

If N0 is the original mass of the substance of half-life t 1/2 = 4 years then the amount of substance left after 12 years is :

Match list I with list II

	List I (electronic device)		List-II(Use/application)
A	Photo diode	I	Remote controls
B	Zener diode	II.	Amplifier
C	Light emitting diode	III	Voltage regulator
D	Transistor	IV	Photo detector

Choose the correct answer from the options given below:

The ratio of radii of two nuclei having atomic mass numbers 27 and 8 respectively, will be:

Suppose K is open and the rod is moved with speed of 12 cms-1 in the direction. The magnitude of the induced EMF will be :

The difference in mass of A nucleus and its constituent nucleon is called

A proton and an Alpha particle moving with the same kinetic energy enter the range of a uniform magnetic field perpendicular to it. the ratio radii of their trajectors will be

An infinitely long wire is charged uniformly with a charge density λ and placed in the air, the electric field at a distance r from the wire will be:

Which of the following rays used in doing LASIK (Laser-assisted in Situ peratomileusis eye surgery)?

If two sources of intensifies $I_0$ each have a randomly varying phase difference ф, the resultant intensity at centre of screen will be :

To increase the magnification power of a refracting type telescope, we should increase the:

When a forward bias is applied to a PN junction diode then

Number of photo electrons emitted per second is proportional to:

Two point charges (-q) and (+4q) are placed at that separation ‘r’. Where should a third charge be placed so that the entire system of charges becomes in equilibrium?

The magnetic force experienced by the rod when K is closed will be :

Magnetic field due to the current carrying wire as shown in the figure at point “O” will be:

To convert a galvanometer into an ammeter, one should connect :

A parallel plate capacitor having cross-sectional area ‘A’ and separated by distance ‘d’ is filled by a copper plate of thickness b. its capacitance is :

A conducting sphere is charged. If the electric field at a distance of 20 cm from the center of this sphere is 1.2x103NC-1 and points radially inward, the net charge on this sphere is

Match list I with list II

	List I (electronic device)		List-II(Use/application)
A	Photodiode	I	Remote controls
B	Zener diode	II.	Amplifier
C	Light emitting diode	III	Voltage regulator
D	Transistor	IV	Photodetector

Choose the correct answer from the options given below:

The face difference(∆ф) between two superimposing waves to obtain constructive interference and his right band is :

Choose the logic operation carried out by the following current: