Physics

How is the e.m.f. across primary and secondary coils of a transformer
How can a temperature in degree Celsius be converted into S.I. unit of temperature
A solid metal weighing 150 g melts at its melting point of 800° C by providing heat at the rate of 100 W
Identify the following wires used in a household circuit
What are isobars
State any two advantages of electromagnets over permanent magnets
Derive a relationship between S.I. and C.G.S. unit of work
A half metre rod is pivoted at the centre with two weights of 20 gf and 12 gf suspended at a perpendicular distance
A ray of light XY passes through a right angled isosceles prism as shown below
An object AB is placed between O and F1 on the principal axis of a converging lens as shown in the diagram
An object is placed at a distance of 12 cm from a convex lens of focal length 8 cm
Draw the diagram of a right angled isosceles prism which is used to make an inverted image erect
The diagram above shows a wire stretched over a sonometer
A person is standing at the sea shore. An observer on the ship which is anchored
A fuse is rated 8A. Can it be used with an electrical appliance rated 5 KW, 200 V? Give a reason.
Find the equivalent resistance between A and B
An electric iron is rated 220V, 2kW
Heat supplied to a solid change it into liquid. What is this change in phase called
State two differences between Heat Capacity and Specific Heat Capacity
The temperature of 170g of water at 50°C is lowered to 5°C by adding certain amount of ice to it. Find the mass of ice added
The diagram shows a coil wound around a U shape soft iron bar AB
The ore of Uranium found in nature contains 92U238 and 92U235
A brass ball is hanging from a stiff cotton thread
The distance between two bodies is doubled
Why is a jack screw provided with a long arm
If the power of a motor be 100 kW
Which class of lever will always have MA > 1 and why
Define heat capacity and state its SI unit
Why is the base of a cooking pan generally made thick
A solid of mass 50 g at 150oC is placed in 100 g of water
real and apparent depth
Draw a ray diagram to show the refraction of a monochromatic ray
An enemy plane is at a distance of 300 km from a radar
How is the frequency of a stretched string related to
Define specific resistance and state its SI unit
An electric bulb of resistance 500Ω, draws a current of 0.4A
State two causes of energy loss in a transformer
State two characteristics of a good thermion emitter
State two factors upon which the rate of emission of thermions depends
When does the nucleus of an atom tend to be radioactive
A uniform half metre rule balances horizontally on a knife edge
A boy uses a single fixed pulley to lift a load of 50 Kgf to some height
How does uniform circular motion differ from uniform linear motion
Name the process used for producing electricity using nuclear energy
A pulley system with VR = 4 is used to lift a load of 175 kgf
How is the transference of heat energy by radiation
You have a choice of three metals A, B and C, of specific heat capacities
Calculate the mass of ice needed to cool 150g of water
Name the radiations which are absorbed by greenhouse
A radiation X is focused by a particular device on the bulb