Short Answer TypeComplete 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?
Long Answer TypeA 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%?
i) T depicts the Load and E the Effort
ii)
Efficiency = 
x 100
75 = 
× 100
M.A. = 
= 3.75
M.A. =
3.75 =
Load = 3.75 × 150
= 562.5 kgf
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.
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