Physics

A music system draws a current of 400 mA when connected to a 12 V battery
Calculate the quantity of heat produced in a 20 Ω resistor carrying
State the characteristics required of a good thermion emitter
An element ZSA decays to 85R222 after emitting 2 α particles
A radioactive substance is oxidized
State the characteristics required in a material
Which coil of a step up transformer is made thicker and why
A stone of mass ‘m’ is rotated in a circular path with a uniform speed
An effort is applied on the bigger wheel of a gear having 32 teeth
What kind of pulleys are A and B
A pulley system has three pulleys
What is the principle of method of mixtures
Some ice is heated at a constant rate, and its temperature
A copper vessel of mass 100 g contains 150 g of water at 50°C
Write a relationship between angle of incidence and angle of refraction
When a ray of light enters from one medium to another having different optical
Write one condition where it does not bend when entering
A lens produces a virtual image between the object and the lens
What do you understand by the term ‘Scattering of light’
Name the waves used for echo depth sounding
What is an echo
Name the phenomenon involved in tuning a radio set to a particular station
Name the transformer used in the power transmitting station
A battery of e.m.f. 12V and internal resistance 2 Ω is connected with two resistors
Arrange α, β and γ rays in ascending order with respect to their
In a cathode ray tube what is the function of anode
Represent the change in the nucleus of a radioactive element