Physics questions
20027 published questions with worked solutions.
- An inductor of reactance 100 Ω, a capacitor of reactance 50 Ω, and a resistor of resistance 50 Ω are connected in series with an...
- Two cylindrical rods A and B made of different materials, are joined in a straight line. The ratios of lengths, radii and thermal...
- A parallel plate capacitor has charge 5 10^ -6 C. A dielectric slab is inserted between the plates and almost fills the space...
- The pressure that has to be applied to the ends of a steel wire of length 10 cm to keep its length constant when its temperature...
- The radiation corresponding to 3 2 transition of hydrogen atom falls on a metal surface to produce photoelectrons. These...
- A bob of mass m attached to an inextensible string of length is suspended from a vertical support. The bob rotates in a...
- A thin convex lens made from crown glass ( = 3 2 ) has focal length f. When it is measured in two different liquids having...
- A green light is incident from the water to the air-water interface at the critical angle ( ). Select the correct statement -
- A block of mass m is placed on a surface with a vertical cross section given by y = x^3 6 . If the coefficient of friction is...
- The coercivity of a small magnet where the ferromagnet gets demagnetized is 3 10^3 A m^ -1 . The current required to be passed in...
- Two beams, A and B, of plane polarized light with mutually perpendicular planes of polarization are seen through a Polaroid. From...
- Assume that an electric field E = 30x^2 , i exists in space. Then the potential difference V_A - V_O, where V_O is the potential...
- Match List-I (Electromagnetic wave type) with List-II (Its association/application) and select the correct option from the...
- The current voltage relation of diode is given by I = (e^ 1000V/T - 1) mA, where the applied voltage V is in volts and the...
- A pipe of length 85 cm is closed from one end. Find the number of possible natural oscillations of air column in the pipe whose...
- In a large building, there are 15 bulbs of 40 W, 5 bulbs of 100 W, 5 fans of 80 W and 1 heater of 1 kW. The voltage of the...
- Four particles, each of mass M and equidistant from each other, move along a circle of radius R under the action of their mutual...
- From a tower of height H, a particle is thrown vertically upwards with a speed u. The time taken by the particle, to hit the...
- A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it?
- A parallel plate capacitor is made of two circular plates separated by a distance of 5 mm and with a dielectric of dielectric...