CURRENT ELECTRICITY PART 3
21. The resistance of two wires is 25 ohm when connected in series and 6 ohm when joined in parallel. The resistance of each wire is
(a) 10 ohm 15 ohm
(b) 5 ohm 10 ohm
(c) 20 ohm 30 ohm
(d) 10 ohm 20 ohm
22. An instrument which detects electric current is known as
(a) voltmeter
(b) rheostat
(c) galvanometer
(d) wattmeter
23. Resistance of 10 ohm 15 ohm and 30 ohm are connected in parallel.The total resistance of the combination is.
A .5 ohms
b. 10 ohms
c. 15 ohms
d. 55 ohms
24. A light bulb draws 300mA when the voltage across it is 240 volt .The resistance of the light bulb is
a. 400 ohm
b. 600 ohm
c. 800 ohm
d.1000 ohm
25. Resistance of a parallel circuit consisting of two branches is 12 Ohm if the resistance of one branch is 18 ohms what is the resistance of the other
a. 18 ohm
b. 36 ohm
c. 48 ohm
d. 64 ohm
26. Four wires of same material the same cross sectional area and the same length when connected in parallel give a resistance of 0.25 ohm if the four wires are connected in series the effective resistance will be
a. 1 ohm
2. 2 ohm
c. 3 ohm
d. 4 ohm
27. A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively the current in each branch is
a. 6.4 ampere, 6.9 ampere
b. 6.4 ampere ,9.6 ampere
C. 4.6 ampere, 6.9 ampere
d. 4.6. ampere, 9.6 Ampere
28. Current velocity through a copper conductor is
a. The same as propagation velocity of electric energy
b.indepandent of current strength
c. of the order of a few microsecond per meter
d. nearly 3 into 10 to the power 8 metre per second
29. Which of the following material has nearly zero temperature coefficient of resistance
a. manganin
b. Porcelain
d. carbon
d. copper
30. You have to replace 1500 ohm resistor in radio you have no 1500 ohm resistor but have several 1000 ohm once which you would connect
a. two in parallel
b. two in parallel and one in series
c. Three in parallel
d.Three in series
Use omr sheet and command all mcq.
21. a ,22.c, 23.a 24.c, 25.b,26.d, 27.b, 28.c,29.a, 30.b
(b) 5 ohm 10 ohm
(c) 20 ohm 30 ohm
(d) 10 ohm 20 ohm
22. An instrument which detects electric current is known as
(a) voltmeter
(b) rheostat
(c) galvanometer
(d) wattmeter
23. Resistance of 10 ohm 15 ohm and 30 ohm are connected in parallel.The total resistance of the combination is.
A .5 ohms
b. 10 ohms
c. 15 ohms
d. 55 ohms
24. A light bulb draws 300mA when the voltage across it is 240 volt .The resistance of the light bulb is
a. 400 ohm
b. 600 ohm
c. 800 ohm
d.1000 ohm
25. Resistance of a parallel circuit consisting of two branches is 12 Ohm if the resistance of one branch is 18 ohms what is the resistance of the other
a. 18 ohm
b. 36 ohm
c. 48 ohm
d. 64 ohm
26. Four wires of same material the same cross sectional area and the same length when connected in parallel give a resistance of 0.25 ohm if the four wires are connected in series the effective resistance will be
a. 1 ohm
2. 2 ohm
c. 3 ohm
d. 4 ohm
27. A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively the current in each branch is
a. 6.4 ampere, 6.9 ampere
b. 6.4 ampere ,9.6 ampere
C. 4.6 ampere, 6.9 ampere
d. 4.6. ampere, 9.6 Ampere
28. Current velocity through a copper conductor is
a. The same as propagation velocity of electric energy
b.indepandent of current strength
c. of the order of a few microsecond per meter
d. nearly 3 into 10 to the power 8 metre per second
29. Which of the following material has nearly zero temperature coefficient of resistance
a. manganin
b. Porcelain
d. carbon
d. copper
30. You have to replace 1500 ohm resistor in radio you have no 1500 ohm resistor but have several 1000 ohm once which you would connect
a. two in parallel
b. two in parallel and one in series
c. Three in parallel
d.Three in series
Use omr sheet and command all mcq.
21. a ,22.c, 23.a 24.c, 25.b,26.d, 27.b, 28.c,29.a, 30.b
to be continued stay with us...
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