List of top Physics Questions

A car accelerates uniformly from rest to a speed of 20 m/s in 8 seconds. What is the distance covered by the car during this time?
A total charge \(q\) is uniformly distributed over a circular ring of radius \(R\). The ring is rotated about its axis with angular velocity \(\omega\). Find the magnetic dipole moment of the ring.
A charged particle of mass \( m \) and charge \( q \) moves with a velocity \( \vec{v} \) perpendicular to a magnetic field \( \vec{B} \). The radius of the circular path it follows is:

One mole of an ideal gas at 300 K is compressed isothermally from a volume of \(V_1\) to \(V_2\). Calculate:
The work done on the gas
The change in internal energy
The heat exchanged with the surroundings
Use \(R = 8.314\, \text{J/molK}\), \( \ln(2.5) = 0.916\)

A Carnot engine operates between \( 500 \, \text{K} \) and \( 300 \, \text{K} \). If it absorbs \( 1000 \, \text{J} \) of heat from the source, the amount of work done by the engine is:
A ball is thrown vertically upward with a speed of 20 m/s. How high will it rise before coming to rest momentarily? (Take g = 10 m/s2)
A body starts from rest and accelerates uniformly at 2 m/s\(^2\). What is the distance covered in 5 seconds?
A ball is thrown vertically upwards with a speed of 20 m/s. How high will it rise? (Take \( g = 10 \, \text{m/s}^2 \))
A force of 10 N acts on a 2 kg object initially at rest, moving it 8 m along a straight line. What is the work done by the force? Assume the force is parallel to the displacement.
A solid sphere of mass $M$ and radius $R$ is rotating about its diameter. What is its moment of inertia about the same axis?
A ray of light passes from air into glass (refractive index = 1.5) at an angle of incidence 60°. What is the angle of refraction?
A block of mass 5 kg is placed on a rough inclined plane making an angle of 30° with the horizontal. The coefficient of static friction between the block and the plane is 0.4. Will the block slide down the plane? If yes, what is the acceleration?
What is the acceleration of a body of mass 4 kg when a force of 20 N is applied to it?
A body of mass 4 kg is moving with a velocity of 3 m/s. What is its kinetic energy?
Two capacitors of capacitance 4 µF and 6 µF are connected in series and then connected to a 120 V battery. The energy stored in the system is:
A 100 W electric bulb is used for 5 hours daily. What is the energy consumed in 30 days?
A resistor of 10 \(\Omega\) is connected across a 12 V battery. What is the power dissipated in the resistor?
In an equilateral triangle with each side having resistance \( R \), what is the effective resistance between two sides?

A test tube of mass 8 g and uniform cross-sectional area 12 cm2 is floating vertically in water. It contains 12 g of lead at the bottom. When the tube is slightly depressed and released, it performs vertical oscillations.
Find the time period of oscillation.

Two particles are projected at angles \( \theta \) and \( (90^\circ - \theta) \) with the same speed of 25 m/s. If the second particle reaches 15 m higher than the first, then the angle of projection \( \theta \) is:

Two light waves of intensities \(I_1 = 4I\) and \(I_2 = I\) interfere. If the path difference between the waves is 25 % of the wavelength \(\lambda\), find the resultant intensity at that point.

An electric bulb is rated 100 W, 220 V. What is the resistance of the filament?
The frequency of a wave is 500 Hz and its wavelength is 0.66 m. What is the speed of the wave?
A wire of length 2 m and cross-sectional area \(1 \, \text{mm}^2\) is stretched by a force of 10 N. If Young's modulus of the material is \(2 \times 10^{11} \, \text{N/m}^2\), what is the extension in the wire?

In a nuclear reactor, fuel is consumed at the rate of \(2 \times 10^{-3}\) g/s. If 100 % of the mass is converted to energy, find the power output of the reactor in kilowatts (kW).