Advertisements
Advertisements
Question
Complete the following:
1 kWh = _________ J
Advertisements
Solution
1 kWh = 3.6 x 106 J
RELATED QUESTIONS
Draw the electrical symbols of the following components and state its use:
Rheostat (variable resistance)
One coulomb of charge flows through any cross-section of a conductor in 1 second. What is the current flowing through the conductor?
A battery and three lamps are connected as shown:
Which of the following statements about the currents at X, Y and Z is correct?
(a) The current at Z is greater than that at Y.
(b) The current at Y is greater than that at Z.
(c) The current at X equals the current at Y.
(d) The current at X equals the current at Z.
Using the circuit given below, state which of the following statement is correct?
(a) When S1 and S2 are closed, lamps A and B are lit.22
(b) With S1 open and S2 closed, A is lit and B is not lit.
(c) With S2 open and S1 closed A and B are lit.
(d) With S1 closed and S2 open, lamp A remains lit even if lamp B gets fused.
Define the following:
Super conductors
Find the effective resistance in the following circuit diagrams (Fig.):
60 joules of heat was dissipated in a resistor when 20 C flowed for 5 s. Calculate:
(a) P.d. across the resistor,
(b) Resistance of the resistor, and
(c) Average power dissipated in the resistor.
Explain, why the potential difference across the terminals of a cell is more when the cell is not in use than it is when the cell is being used.
Problems for practice:
If 3A current flows through a circuit, then convert the current in terms of a milliampere.
