List of top Physics Questions

The ratio of the shortest wavelength of the Balmer series to the shortest wavelength of the Paschen series is:

Sphere of color black, red, white, and yellow are heated to the same temperature. The decreasing order of cooling is:

Which elements have the same magnetic moment \( \mu \)?

Two charges \( q_1 = 2 \, \mu \mathrm{C} \) and \( q_2 = -3 \, \mu \mathrm{C} \) are placed 10 cm apart in a vacuum. What is the magnitude and direction of the force between them?

In a meter bridge experiment, a resistance of \( 10 \, \Omega \) is balanced by a resistance \( X \) with a balance point at \( 40 \, \mathrm{cm} \). What is the value of \( X \)?

What is the expression for the time period of a satellite orbiting Earth at a height \( h \) above the Earth's surface?

What is the output of a NAND gate when both inputs are HIGH?

The coefficient of performance of a refrigerator is 5. If the temperature inside the freezer is \( -20^\circ \mathrm{C} \), what is the temperature of the surroundings to which it rejects heat?

A metallic sphere of radius \( R \) is charged to a potential \( V \). The magnitude of the electric field at a distance \( r \, (r > R) \) from the center of the sphere is:

Which of the following correctly represents the AND logic gate?

Find the ratio of K.E. and P.E. when a particle performs SHM and is at \( \frac{1}{n} \) times its amplitude from the mean position.

A pendulum having a negatively charged metal knob is oscillating on a positively charged surface. The time of the pendulum will be:

If a copper rod carries a direct current, the magnetic field associated with the current will be?

A wheel of diameter 20 cm is rotating at 600 rpm. The linear velocity of a particle at its rim is:

Rate of cooling of a body is \(0.2^\circ \text{C/min}\) when excess temperature is \(20^\circ \text{C}\). The proportionality constant \( k \) is:

What is the angular frequency \( \omega \) of a simple harmonic oscillator with mass \( m \) and spring constant \( k \)?

What is the fundamental frequency of an open organ pipe with length \( L \) and speed of sound \( v \)?

Which of the following is NOT a layer of the urinary bladder?

In a series LCR circuit connected to an AC source, at resonance, the current is maximum because:

In Young's double slit experiment, if the distance between the slits is doubled while keeping the wavelength and the distance to the screen constant, the fringe spacing will:

What is the equivalent logic gate when the output of an AND gate is passed through a NOT gate?

Find the solubility product of \( \mathrm{Ba(OH)_2} \)?
Where \( S = 1.73 \times 10^{-14} \).