Physics questions
20027 published questions with worked solutions.
- Two conducting wires made of the same material have lengths L and 1·2 L. If the volume of the longer wire is half that of the...
- A biconvex lens is made of a material of refractive index 2 such that the ratio of the radii of curvature of its two faces is 1 :...
- In a carrom game, a striker of mass 15 g hits a coin of mass 5 g head on and the coin moves with a speed of 0·36 m/s. If the time...
- A heating filament and an ideal resistor of fixed value are connected in series with a DC voltage source. After some time, the...
- Two astronauts X and Y float in deep space far from external forces. Initially, they are at rest relative to one another. X...
- A uniform rope hangs symmetrically over a smooth pulley. One end of the rope is given a slight mass, making that side slightly...
- An insulating container contains 250 g of water at 20°C. Steam at 100°C is passed through it, heating it up to 25°C. During this...
- Three parallel glass slabs of refractive indices 1·5, 3 and 1·5 respectively have widths 2 mm, 1 mm and 4 mm. The combination is...
- Two point charges of 4 C and 16 C are kept at a distance of 0·18 m. A third point charge of 1 C is kept between them such that...
- Consider the following statements in respect of sound waves : I. The speed of sound waves decreases with an increase in...
- Consider the following statements : Statement-I : Marine animals remain alive in winter and move near the bottom of lakes despite...
- A particle of mass m moves in circular orbits with potential energy V(r) = Fr, where F is a positive constant and r is its...
- The filament of a light bulb has surface area 64 mm ^2. The filament can be considered as a black body at temperature 2500 K...
- Sometimes it is convenient to construct a system of units so that all quantities can be expressed in terms of only one physical...
- Put a uniform meter scale horizontally on your extended index fingers with the left one at 0.00 cm and the right one at 90.00 cm....
- Consider one mole of helium gas enclosed in a container at initial pressure P_1 and volume V_1. It expands isothermally to volume...
- A stationary tuning fork is in resonance with an air column in a pipe. If the tuning fork is moved with a speed of 2 ms ^ -1 in...
- A circular disc of radius R carries surface charge density (r) = _0 (1 - r R ), where _0 is a constant and r is the distance from...
- A train with cross-sectional area S_t is moving with speed v_t inside a long tunnel of cross-sectional area S_0 (S_0 = 4S_t)....
- A hot air balloon is carrying some passengers, and a few sandbags of mass 1 kg each so that its total mass is 480 kg. Its...