Physics questions
20027 published questions with worked solutions.
- Experimentally it is found that 12.8 eV energy of required to separate a hydrogen atom into a proton and an electron. So the...
- A beam of light consisting of two wavelengths 7000 Å and 5500 Å is used to obtain interference pattern in Young's double slit...
- A metal block of mass m is suspended from a rigid support through a metal wire of diameter 14 mm. The tensile stress developed in...
- Incandescent bulbs are designed by keeping in mind that the resistance of their filament increases with the increase in...
- An AC voltage source of variable angular frequency and fixed amplitude V_0 is connected in series with a capacitance C and an...
- A student uses a simple pendulum of exactly 1m length to determine g, the acceleration due to gravity. He uses a stop watch with...
- A point mass of 1 kg collides elastically with a stationary point mass of 5 kg. After their collision, the 1 kg mass reverses its...
- The focal length of a thin biconvex lens is 20cm. When an object is moved from a distance of 25cm in front of it to 50cm, the...
- An -particle and a proton are accelerated from rest by a potential difference of 100V. After this, their de Broglie wavelengths...
- When two identical batteries of internal resistance 1 , each are connected in series across a resistor R, the rate of heat...
- Two spherical bodies A (radius 6 cm) and B (radius 18 cm) are at temperatures T_1 and T_2, respectively. The maximum intensity in...
- When two progressive waves y_1 = 4 (2x - 6t) and y_2 = 3 (2x - 6t - 2 ) are superimposed, the amplitude of the resultant wave is
- A 0.1 kg mass is suspended from a wire of negligible mass. The length of the wire is 1m and its cross-sectional area is 4.9 10^...
- A binary star consists of two stars A (mass 2.2M_S) and B (mass 11M_S), where M_S is the mass of the sun. They are separated by...
- Gravitational acceleration on the surface of a planet is 6 11 g, where g is the gravitational acceleration on the surface of the...
- A piece of ice (heat capacity = 2100 J kg^ -1 ^ C^ -1 and latent heat = 3.36 10^5 J kg^ -1 ) of mass m grams is at -5^ at...
- A stationary source is emitting sound at a fixed frequency f_0, which is reflected by two cars approaching the source. The...
- A Vernier calipers has 1 mm marks on the main scale. It has 20 equal divisions on the Vernier scale which match with 16 main...
- A hollow pipe of length 0.8 m is closed at one end. At its open end a 0.5 m long uniform string is vibrating in its second...
- A biconvex lens of focal length 15 cm is in front of a plane mirror. The distance between the lens and the mirror is 10 cm. A...