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Physics Grade 10 Unit 4: Static and Current Electricity

national exam questions have come from this unit. It runs 60 pages; one careful study pass takes about 5.5 hours, and its difficulty is moderate among Physics units. Each section below lists the questions set from it, with the year, and opens the page that teaches it.

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4.1 Charges in Nature · read p. 92
Not asked in a national paper yet.
4.2 Methods of Charging a Body · read p. 94
  • 2018 E.C., Q1 – During a charging process by induction, a positively charged rod is brought closed to a neutral metal sphere mounted on an insulated stand without touching it. Then, the metal sphere:
  • 2014 E.C., Q20 – One of the following statements is a correct description of the charging processes?
  • 2008 E.C., Q31 – No numbers or field lines are drawn.]
4.3 The electroscope · read p. 97
  • 2018 E.C., Q2 – A positively charged rod is brought near to a neutral electroscope A and a negatively charged rod is brought near to a neutral electroscope B. What will happen to the gold foils of the electroscopes? The gold foils of:
4.4 Electrical Discharge · read p. 100
Not asked in a national paper yet.
4.5 Coulomb’s law of electrostatics · read p. 103
  • 2018 E.C., Q46 – Two equal point charges of +3.6 × 10-6 C are placed 1.0 cm apart to each other. What is the magnitude of the electrostatic force between the charges?
4.6 The electric field · read p. 105
Not asked in a national paper yet.
4.7 Electric circuits · read p. 107
Not asked in a national paper yet.
4.8 Current, Voltage, and Ohm’s Law · read p. 110
  • 2017 E.C., Q35 – A wire that has a resistance of 6Ω is drawn out so as to make it into a new wire two times as long as the original and half cross-sectional area of the original. What will be the resistance of the new wire?
  • 2014 E.C., Q22 – Which one of the following statements is correct about the resistance of a conductor with a circular cross- section?
  • 2007 E.C., Q33 – In aluminium and copper wires with circular cross sections have equal length and equal resistance, then the ratio of the radius of aluminium to that of copper should be the same as that of the________
  • 2007 E.C., Q38 – Which one of the following actions increases the magnetic energy density in the interior of a very long current carrying solenoid?
  • 2006 E.C., Q19 – What is the resistance of a copper cable if it has a cross sectional area of $1\,\text{cm}^2$ and a length of $2\,\text{km}$? The resistivity of copper is $2\times10^{-8}\,\Omega\text{m}$.
  • 2006 E.C., Q38 – Wire B has twice the length and twice the radius wire A. Both wires are made from the same material. If wire A has a resistance R, what is the resistance of wire B?
4.9 Combination of resistors in a circuit · read p. 120
  • 2018 E.C., Q45 – Across each resistor R1, R2, and R3 in the parallel circuit, there is a voltmeter measuring the potential difference, labeled V4, V5, and V6 respectively.]
  • 2017 E.C., Q33 – Four resistors are connected to a voltage source as shown in the figure below. Which one of the following is correct about the circuit? Question Diagram
  • 2015 E.C., Q6 – A 64 V battery is connected to a series combination of 3 kΩ bulb and 4 kΩ electric iron. If the total current in the circuit is 8 mA, what is the internal resistance of the battery?
  • 2013 E.C., Q10 – Capacitive reactance is defined as
  • 2012 E.C., Q9 – Both parallel branches connect back to the bottom rail returning to the negative terminal of the voltage source.]
  • 2007 E.C., Q32 – If several resistors are connected in parallel, the equivalent resistance is
4.10 Voltmeter and ammeter connection in a circuit · read p. 128
Not asked in a national paper yet.
4.11 Electrical safety in general and local context · read p. 132
Not asked in a national paper yet.
4.12 Electric projects · read p. 136
Not asked in a national paper yet.