List of top Physics Questions

Write True or False:
Voltmeter is more superior to potentiometer.
Write True or False:
Infrared radiation is invented by scientist Retar.
Write True or False:
De-broglie waves are an electromagnetic wave.
Write True or False:
Atom is a positive particle.
The focal length of eye piece in telescope \(\underline{\hspace{3cm}}\) the focal length of the objective.
The frequency of the light wave is order of \(\underline{\hspace{3cm}}\).
Magnetic field is a \(\underline{\hspace{3cm}}\) quantity.
The velocity of light \(\underline{\hspace{3cm}}\) when it goes to rare medium to denser.
The ohmic resistance of an ideal inductance is \(\underline{\hspace{3cm}}\).
The frequency of a Direct Current is \(\underline{\hspace{3cm}}\).
Electromagnetic wave of highest frequency is \(\underline{\hspace{3cm}}\).
Forbidden energy gap for Germanium semiconductor is -
The phase difference between flowing current and applied voltage in alternating circuit containing pure capacitor is -
Which device is used as a rectifier?
Bhabha Atomic Research Centre is situated in -
S.I. unit of current density is -
A diverging lens of focal length 20 cm and a converging lens of focal length 30 cm are placed 15 cm apart with their principal axes coinciding. Where should an object be placed on the principal axis so that its image is formed at infinity?
The potential energy of a particle \( U(x) \) executing simple harmonic motion is given by:
A flask contains a monoatomic and a diatomic gas in the ratio of \( 4:1 \) by mass at a temperature of \( 300K \). The ratio of average kinetic energy per molecule of the two gases is:

An element of \( 0.05 \) m is placed at the origin, carrying a large current of \( 10 A \). The magnetic field at a perpendicular distance of \( 1 \) m is: 
 

Consider an electric field \( \mathbf{E} = E_0 \hat{x} \), where \( E_0 \) is a constant. The flux through the shaded area (as shown in the figure) due to this field is: 
 

A sinusoidal voltage of amplitude \( 25 \) V and frequency \( 50 \) Hz is applied to a half-wave rectifier using a P-N junction diode. No filter is used, and the load resistor is \( 1000\Omega \). The forward resistance \( R_f \) of the ideal diode is \( 10\Omega \). The percentage rectifier efficiency is:
The pressure inside a tyre is 4 times that of the atmosphere. If the tyre bursts suddenly at temperature \( 300K \), what will be the new temperature?
The ozone layer in the atmosphere absorbs:
The equation of a wave on a string of linear mass density \( 0.04 \) kg/m is given by:
\[ y = 0.02 \sin 2\pi \left( \frac{t}{0.04} - \frac{x}{0.50} \right) \] The tension in the string is: