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Q1— Section header —
1.1.2(2\
1.1.35\
1.1.4(6\
1.1.5(2
1.2QU ESTION 2
2.1.1(4\
2.1.2(3\
2.2Define each the following terms:
2.2.1Magnetic induction
2.2.2Self induction
2.2.3Electro magnetic induction
2.2.4Mutual induction
2.3State FOUR characteristics of magnetic lines of force. (4\
2.4Sketch the IEC symbol for each of the following capacitors:
2.4.1Pre set
2.4.2Polarised (2 1\ (2\ [25] 808064125
Q3— Section header —
3.1Complete the following sentences b y filling in the missing word or words Write only the word or words next to the question number (3.1.1
3.1.10\in the ANSWER BOOK.
3.1.1Adding impurity atoms to pure semiconductor material is called
3.1.2An insulating material called separates the two plates of a capacitor.
3.1The outermost shell of an atom is
3.1is a material that does not allow current to flow through it.
3.1cell is that it can be recharged.
3.1Opposite each other.
3.110 A transistor can be used as
3.2The primary winding of a single phase t ransformer has 250 turns and is conn ected to a 240 V AC supply. T he secondary voltage is 6 0 V and carries a current of 1,5 A
3.2.1Number of turns of the secondary winding (3\
3.2.2urrent flow through the primary winding (3\
3.2.1urns ratio (2\
3.3Draw a neat, fully labelled sketch of a sine wave with a peak to peak value of
3.4THRE E cells, each with an emf of 2, 5 V and an internal resistance of 1 , are connected to each other in a series arrangement. Determine the following:
3.4.1otal emf of the battery
3.4.2otal internal resistance (2 2\ (4\ [25] 808064125
Q4— Section header —
4.1Choose the correct word or words from those given in brackets. Write only the word or words next to the ques tion number (4.1.1
4.1.10\in the ANSWER BOOK.
4.1.1type semiconductor material is (intrinsic/extrinsic\.
4.1.2The term pentavalent refers to (four/five/six\valence electrons per atom.
4.1.3/A (digital/analog ue\ measuring instrument is accurate and easy to use.
4.1.4A zener diode is a (voltage regulator/current regulator\.
4.1.5A galvanometer is normally used to measure (small/large\ents.
4.1.6Power is the (rate/ability\ of doing work.
4.1.7A bipolar transistor has (two/three\ctions.
4.1.8An atom that has no free electrons is known as a (conductor/insulator\.
4.1.9Magnetic lines of force are also referred to as (flux/force/charge\
4.1.10The specific gravity of a battery is measured using a (hydrometer/voltmeter/ohmmeter\.
4.3Indicate whether the following statements are TRUE or FALSE. Choose the answer and write only True or alse
4.3.10\the ANSWER BOOK.
4.3.1A relay is an electro magnetic switch.
4.3.2Magnetic lines of force move from south to north inside a bar magnet.
4.3.3A voltmeter is always connected in series with the load.
4.3.4Cells must be connected in parallel with one another in order to increase the current capacity of a battery.
4.3.5The colour code of a 1 resistor with a tolerance value of 5% is brown, black, black, gold. (8080641\
4.3.6Capacitors ha ve a larger capacitance if the plates are far apart.
4.3.7The second shell of an atom can hold a maximum of eight electrons.
4.3.8The strength of an electromagnet is not determined by the type of core used.
4.3.9Silicon and germanium are good conductors.
4.3.10Electrons and protons are found in the nucleus of an atom. (10 1\ (10\ [25] TOTAL: 0025