Question

why is a voltmeter connected in parallel with circuit element i.e resistor across which voltage is to be measured

Answer 1

Voltmeter is connected in parallel with circuit elements because it is used to measure the device's voltage.

This is important because elements in series have same potential difference.

If it's connected in series then it will change the value of potential difference which will minimise the current in the circuit as it has very large resistance and you will get faulty readings.

Answer 2

 Now, we know that voltmeter is always connected in parallel to the element across which potential difference i.e. voltage is to be measured. This is done so as our aim is to not to alter the value of current flowing though the circuit rather to measure voltage drop across the element. An ideal voltmeter has ... ohk