List of top Physics Questions on Current electricity asked in Kerala SSLC Exam

The resistance of a heating coil in a heating appliance operating at \(200\ \text{V}\) is \(60\ \Omega\).
  • [(a)] Which alloy is used to make heating coil of heating appliances?
  • [(b)] Calculate the amount of heat produced if electricity flows through this appliance for 5 minutes.
  • [(c)] If another appliance with a resistance less than \(60\ \Omega\) is operated at the same voltage for 5 minutes, will the amount of heat produced increase or decrease? What is your justification?
(A) A heating appliance produces \(7200000\ \text{J}\) heat in 2 hours.
  • [(a)] What is the energy change in a heating appliance?
  • [(b)] Calculate the power of the appliance.
OR (B) An electric grinder with a power of \(400\ \text{W}\) is working.
  • [(a)] What is the energy change in this equipment?
  • [(b)] Calculate the work done by this grinder in 1 minute.
A portion of electric circuit diagram of a household wiring is given.
  • [(a)] What does the part marked as “X” represent in the circuit?
  • [(b)] Draw a circuit diagram of a branch circuit which includes one three pin socket with switch.
What does the term “Ohmic Heating” indicate?