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Metre bridge- Law of combination of resistors
Metre bridge- Law of combination of resistors
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1)
In a circuit, if the resistors are connected in series, then the current is:
Same in every part of the circuit.
Different in every part of the circuit.
Inversely proportional to the resistance.
None of these.
2)
When two resistors are connected in series, what is the number of common points found by a student?
Four
Three
One
Two
3)
When the three resistances X1, X2 and X3 are connected in series combination, then the effective resistance is, Xs:
Xs=(X1+X2+X3)/X1X2X3
Xs=X1+X2+X3
Xs=X1+(X2X3)/(X2+X3)
Xs=X1X2X3/(X1+X2+X3)
4)
How is the voltmeter always connected with the circuit?
Series.
Parallel.
Sometimes series, sometimes parallel.
None of the above.
5)
Five identical resistances, each 1Ω, are connected in series. What is the effective resistance of this combination?
0.1 Ω
5 Ω
1 Ω
10 Ω
6)
When two resistances R₁ and R₂ are connected in parallel their equivalent resistance is:
R= (R₁R₂)/(R₁-R₂)
R= (R₁-R₂)/(R₁R₂)
R= (R₁+R₂)/(R₁R₂)
R= (R₁R₂)/(R₁+R₂)
7)
When the three resistances are connected in parallel combination, then the effective resistance ________.
may increase or decrease depends up on the material
increases
decreases
does not change
8)
A student combines the two resistors in parallel combination, the number of common point he found is
One
Two
Three
Four
9)
Two or more resistors are said to be in parallel if one end of a resistor is connected to
Other end of the other resistor
One end of the other resistor
One end of the voltmeter
None of these
10)
Ten identical resistances each 1Ω are connected in parallel. This combination has an effective resistance of:
1 Ω
10 Ω
5 Ω
0.1 Ω
