List of top Physics Questions

Which color has the minimum frequency in the visible spectrum?
What physical quantity is associated with the change in wavelength of a wave?
In which process is the rate of heat transfer maximum?
The emissivity of a substance is:
A 75 kg person lifts a 25 kg object to a height of 10 meters in 5 minutes. What is the power used?
A particle is moving with uniform speed in a circular path. What will be the acceleration of the particle?
Which type of reflection is produced when light reflects from curved and smooth surfaces?
Kilowatt-hour is the unit of:
Which of the following is the SI unit of electric current?
If the electric field and the magnetic field are equal in magnitude and perpendicular to each other, then:
Newton's second law gives the measure of which physical quantity?
Three particles of each mass \( m \) are kept at the three vertices of an equilateral triangle of side \( 1 \). The moment of inertia of the system of the particles about any side of the triangle is:
The RMS value of the electric field of an electromagnetic wave emitted by a source is \( 660 \) N/C. The average energy density of the electromagnetic wave is:
The focal length of double concave lens having refractive index 1.5 kept in air with two spherical surfaces of radii \( R_1 = 20 \, \text{cm} \) and \( R_2 = 80 \, \text{cm} \) is
The focal length of a lens having power 4D is
The magnetic force exerted on a 3 m length conductor carrying 2A current when placed in a uniform magnetic field 0.4 T at an angle 30° is
The focal length of a concave mirror is 20 cm. At what distance the object is placed to obtain the virtual image?
The defect in eye vision that people cannot see objects at long distance is
The tangent drawn to the magnetic field line at a point gives
In Young's double slit experiment light of wavelength 500 nm is used to form interference pattern. A uniform glass plate of refractive index 1.5 and thickness 0.1 mm is introduced in the path of one of the interfering beams. The number of fringes that will shift due to this is
Concave mirrors can produce
A coil of inductance 1H and resistance 100Ω is connected to an alternating current source of frequency $ \frac{50}{\pi} $ Hz. What will be the phase difference between the current and voltage?
A glass of hot water cools from 90°C to 70°C in 3 minutes when the temperature of the surroundings is 20°C. What is the time taken by the glass of hot water to cool from 60°C to 40°C if the surrounding temperature remains the same at 20°C?
The resistance of the galvanometer and shunt of an ammeter are 90 ohms and 10 ohms respectively, then the fraction of the main current passing through the galvanometer and the shunt respectively are:
If $ A $ is the areal velocity of a planet of mass $ M $, then its angular momentum is: