Which of the following will NOT be observed
Question:

Which of the following will NOT be observed when a multimeter (operating in resistance measuring mode) probes connected across a component, are just reversed?

1. Multimeter shows NO deflection in both cases i.e. before and after reversing the probes if the chosen component is capacitor.

2. Multimeter shows a deflection,accompanied by a splash of light out of connected component in one direction and NO deflection on reversing the probes if the chosen component is LED.

3. Multimeter shows NO deflection in both cases i.e. before and after reversing the probes if the chosen compoenent is metal wire.

4. Multimeter shows an equal deflection in both cases i.e. before and after reversing the probes if the chosen component is resistor.

Correct Option: 1

Solution:

(1) Multimeter shows deflection when it connects with capacitor

(2) If we assume that LED has negligiable resistance then multimeter shows no deflection for the forward blas but when it connects in reverse direction, it break down occurs so splash of light out.

(3) The resistance of metal wire may be taken zero, so no deflection in multimeter

(4) No matter, how we connect the resistance across multimeter It shows same deflection.