While experimentally verifying ohm's law a student observed that pointer of the voltmeter coincide with 15th division when the voltmeter has a least count of 0.05 V. Find the observed reading of voltmeter?

In a voltmeter there are 20 divisin between the 0 mark and 0.5 V mark. The least count of the voltmeter is

In a voltmeter there are 20 divisin between the 0 mark and 0.5 V mark. The least count of the voltmeter is

There is a potentiometer wire of length 1200 cm and 60 mA current is flowing in it. A battery of emf 5V and internal resistance of 20 ohm is balanced on potentiometer wire with balancing length 1000 cm. if a voltmeter is connected across the cell, the balancing length decreasing by 20 cm find reading of the voltmeter

In an experiment oh Ohm's law ,the reading of voltmeter across resistor is 15.0 V and reading of current is 0.20 A .The resistance of the resistor in correct significant figure is :

The number of division in ammeter of range 2A is 10 and voltmeter of range 5V is 20.when switch of the circuit given below is closed, ammeter reading is at 8th division and voltmeter reading is at 8th divisions. The value of resistance of resistor is

A galvanometer of resistance 80 ohm gives full scale deflection for a current of 4 mA. How will you convert it into a voltmeter of range 0.5 V?

A galvanometer having 30 divisions has a current sensitivity of 20 muA per division. It has a resistance of 25 Omega . How will you convert it into an ammeter measureing upto IA? How will you convert this ammeter into a voltmeter reading upto 1V?

In a circuit shown in the figure voltmeter reads 30 V, when it is connected across 400 ohm resistance. Calculate what the same votlmeter will read, when connected across the 300 ohm resistance?

A moving coil galvanometer of resistance 10 ohm produces full scale deflection, when a current of 25 mA is passed through it. How will your convert the galvanometer into a voltmeter reading upto 120 V