Physics

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
Name two factors on which the heat energy liberated
A Lens forms an upright and diminished image of an object
A ray of light travels from water to air
The diagram below shows a point source P inside a water container
Loudness of the sound heard
What are damped vibrations
A wire of length 80 cm has a frequency of 256 Hz
The colour code of the wire connected to the metallic body
Draw the diagram of a dual control switch when the appliance is switched ON
Which particles are responsible for current in conductors
To which wire of a cable in a power circuit
To which wire should the fuse be connected
Explain the meaning of the statement current rating of a fuse is 5A
In the transmission of power, the voltage of power generated at the generating stations
Answer the following questions based on a hot cathode ray tube
State three factors on which the rate of emission of electrons
What are free electrons
Give an example of a non-contact force
How does the magnitude of this non-contact force
A boy weighing 40kgf climbs up a stair of 30 steps each 20cm high