CURRENT ELECTRICITY PART 5

CURRENT ELECTRICITY PART 5

41. Insulating materials have the function of..

a.Preventing a short circuit between conducting wires

b. Preventing and open-circuit between the voltage source and the load c. conducting very large currents 

d.Storing very high currents

42. The rating of fuse wire is always expressed in 

a. Ampere-hours

b. Ampere-volts 

c.kilo watt hour 

d.Amperes

43. The minimum charge on ion is

a. Equal to the atomic number of the atom

b. Equal to the charge of an electron

c. Equal to the charge of the number of electrons in an atom 

d.zero

44. In a series circuit with unequal resistances 

a.the highest ressistant has the most of the current through it 

b.the lowest resistance has the highest voltage drop 

c.the lowest assistant has the highest current 

d.the highest resistanceist has the highest voltage drop

45.  The filament of an electric bulb is made of 

a.carbon 

b.aluminium

c. tungsten

d. Nickel

46. 3 ohm resistor having 2 ampere current will dissipate the power of a.2 watts

b.4 watts

c.6 watts

d.8 watts 

47. Which of the following statement is true 

a. A galvanometer with low resistance in parallel is a voltmeter

b. A galvanometer with high resistance in parallel is a voltmeter 

c . A galvanometer with low resistance in series is an ammeter 

d. A Galvanometer with high resistance in series is an ammeter

48. The resistance of a few metres of wire conductor in closed electrical circuit is

a.Practically zero 

b. low 

c. High 

d.very high

49. Parallel circuit is opened in the main line the current

a. increases in the branch of the lowest resistance

b. increases in each branch

c. is zero in all branches

d. is zero in the highest resistive branch

50. If a wire conductor of 0.2 ohm resistance is doubled in length its resistance becomes

a.  0.4 ohm 

b. 0.6 ohm 

c. 0.8 ohm

d. 1.0 Ohm

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41.a, 42.d, 43.b, 44.d, 45.c, 46.c,  47.c, 48.a, 49c, 50.a