Name the unit in which the work function of a metal is expressed?
The unit of work functions is, eV (electron volt); 1 eV = 1.6 x 10-11 J
Complete the diagram as given above by drawing the deflection of radioactive radiation in an electric field.
An atomic nucleus A is composed of 84 protons and 128 neutrons.
i) The nucleus A emits an alpha particle and is transformed into nucleus B. What is the composition of nucleus B?
ii) The nucleus B emits a beta particle and is transformed into a nucleus C. What is the composition of nucleus C?
iii) Does the composition of nucleus C change if it emits gamma radiations?A block and a tackle system has V.R. = 5
i) Draw a neat labelled diagram of a system indicating the direction of its load and effort
ii) Rohan exerts a pull of 150 kgf. What is the maximum load he can raise with this pulley system if it’s efficiency = 75%?
Name one factor that affects the lateral displacement of light as it passes through a rectangular glass slab.
In the diagram alongside, A, B, C, D are four pendulums suspended from the same elastic string PQ. The length of A and C are equal to each other while the length of the pendulum B is smaller than that of D. Pendulum A is set into a mode of vibrations.
i) Name the type of vibrations taking place in pendulum B and D?
ii) What is the state of the pendulum C?
iii) State the reason for the type of vibrations in pendulum B and C.