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Physics 10 Chapter 14 - Current and Electricity - 22
1.
Which of the following formula is CORRECT, in parallel combination?
a) R = R
1
= R
2
= R
3
b) I = I
1
= I
2
= I
3
c) V = V
1
+V
2
+V
3
d) V = V
1
= V
2
= V
3
2.
Two resistances of 6 kΩ and 12 kΩ are joined in parallel. A 6 V battery is connected across its ends, find the equivalent resistance of the parallel combination?
a) 2 kΩ
b) 6 kΩ
c) 18 kΩ
d) 4 kΩ
3.
Which of the following formula is CORRECT, in parallel combination?
a) I = I
1
+ I
2
+ I
3
b) V = IR
1
+ IR
2
+ IR
3
c) R = R
1
= R
2
= R
3
d) V = VI
1
+ VI
2
+ VI
3
4.
What is the single resistance called that is equal to the combination of resistances connected in parallel?
a) Transuded resistance
b) Valence resistance
c) Varied resistance
d) Equivalent resistance
5.
The combined resistance of two identical resistors, connected in series is 8 Ω. Their combined resistance in a parallel arrangement will be:
a) 2 Ω
b) 8 Ω
c) 12 Ω
d) 4 Ω
6.
What happens to the intensity or the brightness of the lamps connected in series as more and more lamps are added?
a) Increases
b) Decreases
c) Cannot be predicted
d) Remains the same
7.
Why should household appliances be connected in parallel with the voltage source?
a) To decrease the resistance of the circuit
b) To provide each appliance the same voltage as the power source
c) To provide each appliance the same current as the power source
d) To increase the resistance of the circuit
8.
Which metal is used as the filament of an electric bulb?
a) Copper
b) Aluminium
c) Tungsten
d) Plastic
9.
What is the formula of equivalent resistance for parallel combination?
a) Re = R1 - R2 - R3
b) Re = R1 + R2 + R3
c) 1 / Re = 1 / R1 - 1 / R2 - 1 / R3
d) 1 / Re = 1 / R1 + 1 / R2 + 1 / R3
10.
Two resistances of 2 kΩ and 8 kΩ are joined in series, if a 10 V battery is connected across the ends of this combination, find the equivalent resistance of the series combination?
a) 6 kΩ
b) 5/8 kΩ
c) 40 kΩ
d) 10 kΩ
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