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What are radiation hazards? Mention four safety measures which should be taken against radioactive radiation.
OR
Explain radio isotopes? Write their any four uses.
Describe the working of a full wave rectifier using semi - conductor diodes, with the help of a labeled circuit diagram.
A bullet with mass m is fired into a block of a mass M intially at rest at the edge of a frictionless table of a given height. the bullet remains in the block, and after the impact
Electrical work: Electrical work is done if a quantity of charge (coulombs) is moved between two points which are at different electrical potentials. The SI unit of work
Assume a car rolls down a 52.0-m-long inclined parking lot and is stopped by a fence. If it took the car 11.25 s to roll down the hill, what was the acceleration of the car bef
Agriculture: 1. Radio isotopes are used to verify the optimum amount of fertilizer for the plants. 2. It is used to kill bacteria and conserved food stuff. 3. It is used
It is based on the principle that conductivity of a semiconductor enhances with increase in the intensity of incident light. In this, a thin layer of some semiconductor (as
The neutrons and protons in a stable nucleus are held together by nuclear forces and energy is required to pull them infinitely apart (or the similar energy is released during the
Q. Give the drawbacks of Sommerfeld’s atom model? Drawbacks of Sommerfeld's atom model: (i) It couldn't explain the distribution and arrangement of electrons in atoms.
With the help of a circuit diagram, explain how regenerative feedback is provided in an Hartley oscillator?
The average distance of an electron in an atom from its nucleus is of the order of: (1) 10 6 m (2) 10 -6 m (3) 10 -10 m (4)10 -15 m Ans: (3) 10 -10 m
A bar magnet is overhanging vertically above a closed coil of wire. The bar magnet is unconfined. It remainder vertical as it come near the coil falls straight through the coil and
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