Question

Q1. Explain why tolerance is not given for a POT resistor.

Q2. List five applications where an LDR can be used.

Q3. Discuss what factors could limit the amount of energy stored in a capacitor and explain why capacitors are not useful to store energy for long time.

Q4. Explain why resistance cannot be measured when the resistor is connected to the circuit.

Q5. If you connect a wire between the terminals of a source, the source is then short-circuited. Explain what outcomes you would expect if a voltage source is short-circuited

Answer 1

Q1. POT resistor means variable resistor we can change the value of resistance by varying knob so there will be no tolerance for POT resistor since it's varying every time as per user requirement.

Q2. LDR means Light Dependent Resistor, applications of LDR are 1) LDR is used in automatic street lights 2) it's used in security system in banks, industries e.t.c 3) it's used in alarm circuits 4) it's used in smoke detecting circuits 5) it's used in counting circuits in industries

Q3. Energy stored in a capacitor can be effected by following parameters

1) Amount of voltage applied across the capacitor.

2) Value of the capacitor. Capacitors can't be used for storing energy for long time because in practical case charge stored in a capacitor will be decayed with respect to time so we can't use it for long time.

Q4. When resistor is connected to the circuit additional resistance (resistance of wires and extra elements)will be added so we can't measure exact resistance value of a resistor.

Q5. If a voltage source is short circuited current will flow through it self so it will be destroyed or damaged or since it is short circuited results output voltage will be zero.