Can the potential barrier across a `p - n` junction be measured by simply connecting a voltmeter across the junction ?

In Fig . V_(0) is the potential barrier across a p-n junction, when no battery is connected across the junction

In Fig . V_(0) is the potential barrier across a p-n junction, when no battery is connected across the junction

A voltmeter having a resistance of 1800 Omega employed to measure the potential difference across a 200 Omega resistor which is connected to the terminals of a dc power supply having an emf of 50 V and an internal resistance of 20 Omega . What is the percentage decrease in the potential difference across the 200 Omega resistor as a result of connecting the voltmeter across it?

p-n junction diode can be used as

In a p-n junction with open ends,

In a p-n junction with open ends,

The P-N junction is-

A high resistance voltmeter measures the potential difference across a battery to be 9-0 V. On connecting a 24 2 resistor across the terminals of the battery, the voltmeter reads 7.2 V. Calculate the internal resistance of the battery.

The barrier potential in a P-N junction is maximum in

Barrier potential of a p-n junction diode does not depend on