NECO Physics · Fields
Electric field: NECO Physics Past Questions and Answers
What the WAEC syllabus covers in Electric field
Our summary: Static charges, capacitors, and current electricity including cells, circuits, resistance and electrical power.
- Electrostatics: production of electric charges (Production by friction, induction and contact.)
- Electrostatics: types of distribution of charges (A simple electroscope should be used to detect and compare charges on differently-shaped bodies.)
- Electrostatics: storage of charges (Application in lightning conductors.)
- Electrostatics: electric lines of force (Determination, properties and field patterns of charges.)
- Electrostatics: electric force between point charges (Coulomb's law. Permittivity of a medium.)
- Electrostatics: concepts of electric field, electric field intensity (potential gradient) and electric potential (Calculation of electric field intensity and electric potential of simple systems.)
- Electrostatics: capacitance - definition, arrangement and application (Factors affecting the capacitance of a parallel-plate capacitor. The farad (F) as unit of capacitance. Capacitors in series and in parallel. Energy stored in a charged capacitor. Uses of capacitors: e.g. in radio and television. (Derivation of formulae for capacitance is not required.))
- Current electricity: production of electric current from primary and secondary cells (Simple cell and its defects. Daniel cell, Leclanché cell (wet and dry). Lead-acid accumulator. Alkaline-cadmium cell. E.m.f. of a cell, the volt (V) as unit of e.m.f.)
- Current electricity: potential difference and electric current (Ohm's law and resistance. Verification of Ohm's law. The volt (V), ampere (A) and ohm (Ω) as units of p.d., current and resistance respectively.)
- Current electricity: electric circuit (Series and parallel arrangement of cells and resistors. Lost volt and internal resistance of batteries.)
- Current electricity: electric conduction through materials (Ohmic and non-ohmic conductors. Examples of ohmic conductors are metals, non-ohmic conductors are semiconductors.)
- Current electricity: electric energy and power (Quantitative definition of electrical energy and power. Heating effect of an electric current and its application. Conversion of electrical energy to mechanical energy e.g. electric motors. Conversion of solar energy to electrical and heat energies: e.g. solar cells, solar heaters.)
- Current electricity: shunt and multiplier (Use in conversion of a galvanometer into an ammeter and a voltmeter.)
- Current electricity: resistivity and conductivity (Factors affecting the electrical resistance of a material should be treated. Simple problems may be set.)
- Current electricity: measurement of electric current, potential difference, resistance, e.m.f. and internal resistance of a cell (Principle of operation and use of ammeter, voltmeter, potentiometer. The Wheatstone bridge and metre bridge.)
Syllabus content © The West African Examinations Council (WASSCE (harmonised West African syllabus)). NECO questions are matched to the WAEC syllabus topic.
NECO Physics questions on Electric field
- NECO 2009Calculate the work done in charging a capacitor of capacitance 20µF through a potential difference of 1000V.
- NECO 2009The electric potential at a distance d from a point charge q in air of permittivity eo is expressed as?
- NECO 2009Electric charges on the surface of a conductor would be most evenly distributed if the shape of the conductor is
- NECO 2009Which of the following cells does not require a dipolar for effective and efficient delivery of current?
- NECO 2005Which of the following is a desirable property of a fuse Wire?
- NECO 2005A 12V battery supplies a current of 0.4A to a lamp. Calculate the resistance of the lamp.
- NECO 2004Calculate the magnitude of the electric field intensity in a vacuum at a distance of 25cm from a charge of 5 × 10-3C. Take ( 1/4πε0 = 9 10^9Nm^2C^ -2 )
- NECO 2004Which of the following is used as a depolarizer in a Denial cell?
- NECO 2004A resistor connected in parallel with a galvanometer so that a large amount of current can be measured is called a/an
- NECO 2004If the distance between the plates of a parallel plate capacitor is decreased, its capacitance
- NECO 2004When the same amount of current, I is passed through different wires under the same conditions, the rates of production of heat are
- NECO 2003A wire of length 100cm and cross-sectional area 2.0 × 10-3cm2 has a resistance of 0.10 ω. Calculate its electrical conductivity.
- NECO 2003Which of the following statements is NOT true?
- NECO 2003Lines of force I. Begin and end on equal and opposite electric charges. II. are in state of tension which causes them to shorten III. attract one another. Which…
- NECO 2003Two equal capacitances are connected first in series and then in parallel. The ratio of the effective series capacitance to the effective parallel capacitance…
- NECO 2003Which of the following instruments can be used to measure e.m.f. most accurately.
- NECO 2003A short chain is usually attached to the rear side of petro tanker trailing behind it to ensure that the
- NECO 2002A negatively charged rod is brought near the cap of an electroscope. The cap is earthed momentarily while the charge is near to it. The rod is then removed…
- NECO 2002If the temperature of a resistance wire is gradually increased, its resistance will
- NECO 2002What is stored by a dry Leclanhé cell?
- NECO 2002The use of electrical fuses in domestic wiring is
- NECO 2002The energy stored in a capacitor of capacitance 5 μF is 40J. What is the voltage applied across its terminals?
- NECO 2002An electric heater takes 4A when operated on a 250V supply. What is the cost of the electricity consumed at 10k per kWh when the heater is used for 5 hours?
- NECO 2001If N.E.P.A. charges 65 kobo per kilowatt-hour for electricity supplied to consumers, what bill would an electric iron rated at 750 watts attract when used for…
- NECO 2001A cell can supply currents of 0.60 A and 0.30 A through a 2.0 ω and a 5.0 ω resistor respectively. What is the internal resistance of the cell?
- NECO 2001An electron of charge a = 1.6 × 10-19C is situated in a uniform electric field of intensity 2.4 × 105 V m-1. What is the force on the electron?
- NECO 2001What is the energy stored in a 10μ F capacitor if the potential difference between the plates is 40 V?
- NECO 2001A lead-acid accumulator is used in preference to a dry battery in a car because
- NECO 2000Two 2.0Ω resistors can be combined circuit to give an overall resistance of
- NECO 2000If a positively charged glass-rod is used to charge an electroscope X by contact and an electroscope Y by induction, then
- NECO 2000An electric iron rated 250 V has a coil of resistance 125Ω. What is the cost of using it for I hour at 10k per kWh?
- NECO 2000The force exerted on a charged body in an electric field depends on I. the charge on the body II. the electric field intensity III. the square of the mass of…
Years with Electric field questions in DeeepSolve's question bank
From the past questions DeeepSolve holds, not a count of everything the exam body has set.
- 2009
- 2005
- 2004
- 2003
- 2002
- 2001
- 2000