Physics
(a) A current of 1 A flows in a series circuit having an electric lamp and a conductor of 5 Ω when connected to a 10 V battery. Calculate the resistance of the electric lamp.
(b) Now, if a resistance of 10 Ω is connected in parallel with this series combination, then what change (if any) in current flowing through 5 Ω conductor and potential difference across the lamp will take place? Give reason.
Related Questions
(a) The isotope of 92U238 decays by α-emission to an isotope of thorium(Th). The thorium isotopes decays by β-emission to an isotope of protactinium (Pa). Write down the equations to represent these two nuclear charges.
(b) Calculate the numbers of α and β particles emitted.
(a) A cell is sending current in an external circuit. How does the terminal voltage compare with the emf of the cell?
(b) At what voltage is the alternating current supplied to our houses?
(c) How should the electric lamps in a building be connected?
Farmers fill their fields with water on a cold winter night. Explain in brief along with a reason.
(a) How would you demonstrate magnetic effect of current? By whom it was discovered?
(b) For the current carrying solenoid as shown below, draw magnetic field lines. Explain that out of the three points A, B and C at which point, the field strength is maximum and at which point it is minimum.
