Complete the diagram as given above by drawing the deflection of radioactive radiation in an electric field.
State any two precautions to be taken while handling radioactive substances.
a) Put on special lead-lined aprons and lead gloves.
b) The radioactive substance are kept in a thick lead containers with a very narrow opening so as to stop radiations coming out from other direction.
c) Radioactive material should be handled with long lead tongs.
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.