Electricity

Which of the given is the SI Unit of Electric Current?

• Ohm

• Ampere

• Volt

• Faraday

The hindrance presented by material of conductor to the smooth passing of electric current is known as:

• Resistance

• Conductance

• Inductance

• None of these

The rate of flow of an electric charge is known as :

• Electric potential

• Electric conductance

• Electric current

• None of these

The instrument used for measuring electric current is :

• Ammeter

• Galvanometer

• Voltmeter

• Potentiometer

The relation between potential difference (V) and current (I) is :

• V α I2

• V α 1/I

• V2 α I

• V α I

Which of the given statements is not true, regarding the electrical set-up for the verification of Ohm’s law:

• The voltmeter is connected in parallel with the known resistance

• The ammeter is connected in series circuit

• The rheostat can only increase the resistance in electric circuit

• The single key is used to switch on/off the electric circuit

Equipment resistance of 4 4Ω resistance in parallel is

• 4Ω

• 1Ω

• 2Ω

• 16Ω

If the current flowing through a fixed resistor is halved, the heat produced in it will become:

• Double

• Half

• One-fourth

• Four times

The commercial unit of energy is:

• Watt

• Watt-hour

• Kilowatt-hour

• Kilo-joule

An electric fuse works on the:

• Chemical effect of current

• Magnetic effect of current

• Lighting effect of current

• Heating effect of current