ELECTRICITY

In which year electricity first came to india ?
1. 1899
2. 1888
3. 1900
4. 1882
By _________ Corporation Limited commissioned ,the first thermal power plant established in India on 17 April 1899
1. Calcutta Electric Supply Corporation
2. Madras Electric Supply Corporation
3. Mumbai Electric Supply Corporation
4. None
One unit of coulomb is charge of approximately __________ protons or electrons.
4. None
If 20 coulomb of electric charge flows through a wire in two minutes, calculate the current in the wire?
1. 0.20 A
2. 0.25 A
3. 0.16 A
4. 0.32 A
Electric current is measured using a device called __________
1. Voltmeter
2. Ammeter
3. Ampere
4. None
If 0.003A current flows through a circuit, then convert the current in terms of micro ampere?
1. 3000 µA
2. 0.03 µA
3. 30000 µA
4. 0.3 µA
In the circuit shown, which switches (L,M or N) must be closed to light up the bulb?
1. switch L only
2. switch M only
3. Switch M and N only
4. either switch L or switches M and N
Small amounts of electrical current are measured in milliampere (mA). How many milliampere are there in 0.25 A ?
1. 25 mA
2. 250 mA
3. 2.5 mA
4. 2500 mA
In which of the following circuits are the bulb connected in series?
The SI unit of potential difference is
1. Ampere
2. ohms
3. Volt
4. S/m
The S.I unit of resistance is
1. ohm
2. volt
3. ampere
4. meters
The S.I Unit of electrical conductivity is
1. Siemens/meter
2. ohm-metre
3. Ampere
4. volt
Electric cell converts _________ energy into electrical energy
1. solar energy
2. chemical energy
3. Mechanical energy
4. None
Examples of secondary cells are
1. Lithium cylindrical cells
2. voltalic cell
3. dry cell
4. None
Examples of Primary cells are
1. alkaline cells
2. button cells
3. voltalic cell
4. None
The ammonium chloride acts as an
1. anode
2. electrolyte
3. cathode
4. none
Conventional current is in the direction to electron flow
1. parallel
2. opposite
3. straight
4. None
A dry cell is a portable form of a leclanche cell
1. alkaline cells
2. voltalic cell
3. leclanche cell
4. None
A circuit interrupting device consisting of a strip of wire that melts and breaks an electric circuit if the current exceeds a safe level.
1. Electric Fuse
2. Conductor
3. Insulator
4. None
In conducting materials electrons are________________ bounded with atoms.
1. loosely
2. tightly
3. freely
4. none
Study the three electric circuits below. Each of them has a glass rod (G), a steel rod (S), and a wooden rod (W). In which of the electric circuits would the bulb not light up .
1. A only
2. C only
3. A and B only
4. A , B and C
Study the electric circuit below. Which of the following switches should be closed so that only two bulbs will light up
1. S1,S2 and S4 only
2. S1, S3 and S5 only
3. S2, S3 and S4 ony
4. S2, S3 and S5 only
In conductors, electrons can flow because their
1. ions are free
2. protons are free
3. electrons are free
4. negative ions are free
Which among these properties is not suited for the conductor material?
1. High electrical conductivity.
2. High specific gravity.
3. Lower cost.
4. High tensile strength.
Ions are charged particles. They are formed when an atom
1. gains electrons
2. gains or loses electrons
3. loses electrons
4. shares electrons
Poor conductor of electricity is
1. silver
2. copper
3. aluminum
4. water
Materials that allow electrons to flow through them is known as
1. insulators
2. conductors
3. electrolytes
4. bases
A current carrying conductor has a
1. magnetic field
2. current capacity
3. voltage capacity
4. resistance capacity
More resistors to a circuit, the
1. lower the resistance
2. resistance may vary
3. same the resistance
4. higher the resistance
An instrument that gives an accurate measurement of electric current flowing in a circuit is known as
1. voltmeter
2. ammeter
3. barometer
4. galvanometer

ELECTRICITY

Quiz