Electricity class 10

Which instrument is used to measure potential difference

• Ammeter

• Voltmeter

• Rheostat

• All of these

This is symbol of

• Resistor

• Cell

• Variable resistance

• Ammeter

Work done in moving a charge of 2C across 2 points having a potential difference of 12V is

• 6J

• 24J

• 12J

• 48J

Which is the correct mathematical form of Ohm"s law

• I = V R

• R = I V

• V = I / R

• V = I R

Resistance of conductor depends on its

• Length

• Area of cross section

• Nature of material

• All of these

SI unit if resistivity

• Ohm

• Ampere

• Ohm metre

• Volt

If 3 resistors of capacity 1 ohm ,,2ohm and 3ohm are connected in parallel then equivalent resistance in the circuit is

• More than 3 ohm

• Less than 1 ohm

• More than 2 ohm

• 6 ohm

This is

• Ohms law

• Faraday's law

• Flemmings law

• Joules law of heating

Electric bulb filament is made of tungsten because it has

• High MP and high resistance

• High MP and low resistance

• Low MP and high resistance

• Low MP and low resistance

The rate of flow of electric charge is

• Electric resistance

• Electric current

• Potential differnce

• Power