Physics
(a) Draw a schematic diagram of main circuit.
(b) Define conductivity.
(c) Of the three connecting wires in a household circuit, which two of the three wires are at the same potential?
Related Questions
(a) Name the time phenomenon involved in tuning a radio set to a particular station.
(b) Define the phenomenon named by you in part (a) above.
(c) What do you understand by loudness of sound?
(d) In which unit, is the loudness of sound measured?
A student stands 330 m from a tall cliff which is 990 m from another tall cliff.
The student fires a pistol and hears some echoes. If the speed of sound between the cliffs is 330 m/s,
(a) What is the time taken by first echo to reach the student?
(b) Find the time interval between the first echo and the second echo.
Three resistors Of 5 Ω, 10 Ω and 15 Ω are connected in series with a 12 V power supply.
(a) Calculate their combined resistance and the current that flows in the circuit and in each resistor.
(b) Find the potential difference across each resistor.
A certain nucleus P has a mass number 16 and atomic number 8.
(a) Find the number of neutrons.
(b) The nucleus P losses
- one proton
- one β-particle
Write the symbol of the new nucleus in each case and express each change by a reaction.