numerical of physics class 10

01. An object of mass 5 kg is lifted up through a distance of 2 meter. What is the work done? Solution: W = F x s Also, force acting on the object is F = mg [Newton's second law of motion] Mass of the object (m) = 5 kg Distance moved = 2m Therefore, Work done = F x s 02. How much work ..

A parallel capacitor of plate area 2m 2 and plate separation 5 mm is charged to 10,000 V in free space. Calculate (a) capacitance (b) Charge (c) Charge density (d) Field intensity (e) Field displacemen..

A straight solenoid has 400 turns wound on a cylinder of radius 5cm and length 40cm. What is the magnetic field at the mid-point of solenoid when a current of 2A flows in i..

Numerical - 10..

10. - A sensitive microphone cannot withstand currents greater than 0.05A. When connected across a thermocouple of emf 8.5 mV, the current in a very low resistance ammeter placed in series in the circuit reads 34 mA. Calculate the resistance of the microphon..

A laser operates at 5 x 10 1 4 Hz and has an aperture of 5 x 10 - 3 . What is the angular spread of the bea..

What is the number of free electrons in a piece of silver of cross-section 1.0 x 10 - 4 m 2 and length 1m? Atomic weight of silver = 108, density of silver = 105 x 10 2 kg m - 3 . Assume that there is one free electron per ato..

Calculate the drift velocity of electrons in a silver wire having cross-sectional area of 3.14 x 10 - 6 m 2 and carrying a current of 20 amperes. Given: Avogadro's number = 6.023 x 10 2 3 , atomic weight of silver = 108. Density of silver = 10.5 x 10..

Determine the radius of the first orbit of the hydrogen atom. What would be the velocity and frequency of the electron in the first orbit? Given: h = 6.62 x 10 - 3 4 Js, m = 9.1 x 10 - 3 1 kg, e = 1.6 x 10 - 1 9 C, k = 9 x 10 9 N m 2 C - 2 ...