The value of the e.m.f of a voltaic cell, which has dilute tetraoxosulphate (VI) acid as its electrolyte and copper and zinc as its electrodes becomes less ...

A lead shot is projected from tha ground level with a velocity u at an angle \(\theta\) to the horizontal. Given the time, t for the lead shot to reach its m...

A ball thrown vertically upward reaches a maximum height of 50 m above the level of projection. Calculate the; (i) time taken to reach the maximum height, (i...

(a) State two properties of cathode rays. (b) Explain how the intensity and energy of cathode rays may be increased.

(a) What is meant by 'a beam of polarised light? (b) With the aid of well labelled diagrams, illustrate the action in of a polaroid spectacle on a beam of su...

(a) Explain how a gas can be made to conduct electricity. (b) Name the electric charge carriers in gases.

(a) What is electrolysis? (b) A current of 2A is passed through a copper voltameter for 5 minutes. If the electrochemical equivalent of copper is 3.27 x 10\(...

(a) The mass and wavelength of a moving electron are 9.0 x 10\(^{-31}\) kg and 1.0 x 10\(^{-10}\)m respectively. Calculate the kinetic energy of the electron...

The above reprt the graph electron energy against the frequency of the radiation incident on a metal surface. lnterprete the; (i) slope of the graph; (ii) in...