- The instrument used to measure electric current is Ammeter
- What is the unit of measuring electrical resistance? Ohm
- What is the resistance of an ideal ammeter? 0
- What is Ohm’s formula ? V – IR
- What is the SI unit of resistance ?Ohm
- Ampere is the unit of electric current
- the unit of consumption of electricity is kilowatt hour
- the element with highest electrical conductivity is silver
- unit of electric power is watt
- The unit of power is Joule per second and Watt
- Current given by battery is called direct current
- The device used for converting A.C into D.C is called Rectifier
- Use of capacitor is to collect charge
- The semiconductor of electricity is Silicon and Germanium
- Current given by battery is called direct current
- What is produced by generator electricity
- Which of the following converts chemical energy into electrical and electrical energy. cell
- Electric current flows due to electrons
- An electric bulb is lit 220 volts, electric current is 0.50 ampere so what is the power of the Bulb 110W
- Which of the following is a scalar quantity? electric potential
- What electricity is produced by dynamo device dynamic
- What do we get from a generator electric energy
- What is the frequency of AC alternative current 50 Hertz
- Copper/silver is good conductors of electricity
- which is ohm’s law? V=IR
- Electric current is the flow of electrons through a conductor
- Electrons flow from the negative terminal to the positive terminal.
- Electric current flows from the positive terminal to the negative terminal.
- The SI unit of electric charge is coulomb (C).
- 1 coulomb (C) of the charge contains 6×10 18 electrons
- The SI unit of current is called ampere (A).
- Electric Current is measured by an ammeter and galvanometer
- The SI unit of potential difference is volt (V).
- Potential difference is measured by a voltmeter and potentiometer.
- Ohms law is a relationship between the potential difference(volatage) across a conductor and the current flowing through it.
- V α I
- V=I R
- I= Q/T
- V= W/Q
- R is a constant called resistance measured in Ohm which is denoted by Ω
- Resistance is the property of a conductor to resist the flow of current through it.
- The resistance of a conductor increases with increase in length
- The resistance of a conductor increases with decrease in area of wire
- R α L /A
- ρ (rho) is a constant of proportionality called Resistivity.
- The SI unit of resistivity is ohm meter ( Ωm).
- Conductors like metals and alloys have low Resistivity.
- Insulators like rubber, glass etc. have high Resistivity
- In the series combination, equivalent resistance is the sum of the resistances of each resistor. RS = R1 + R2 + R3
- In resistors in parallel combination equivalent resistance is the reciprocal sum of the resistances of each resistor.
- The unit of electrical energy is joule (J)
- Electric power is the rate at which electric current is used.
- Power = Work done P = V I
- Electric power is measured in Watt (W)
Current is measured in Ampere(A), Ammeter and galvanometer is used to measure current.