Two resistances of equal value, when connected in parallel, give an equivalent resistance of R. If these resistors are connected in series, the equivalent resistance will be

If two resistances are connected in series, then its equivalent resistance is 45 Ω and if the same resistances are connected in parallel, then its equivalent resistance is 10 Ω, What are the values of these resistances ?

A

10 Ω, 45 Ω

B

10 Ω, 30 Ω

C

15 Ω, 30 Ω

D

10 Ω, 45 Ω

If n resistors of unequal resistances are connected in parallel,and the percenrage error in all resistors are k then,total error in parallel combination is?

A

\(x \frac{∂z}{∂x}+y \frac{∂z}{∂y}=\frac{x^2+y^2}{x+y} e^{\frac{x^2+y^2}{x+y}}\)

B

\(x \frac{∂z}{∂x}+y \frac{∂z}{∂y}=1-\frac{x^2+y^2}{x+y} e^{\frac{x^2+y^2}{x+y}}\)

C

\(x \frac{∂z}{∂x}+y \frac{∂z}{∂y}=1+\frac{x^2+y^2}{x+y} e^{\frac{x^2+y^2}{x+y}}\)

D

\(x \frac{∂z}{∂x}+y \frac{∂z}{∂y}=-\frac{x^2+y^2}{x+y} e^{\frac{x^2+y^2}{x+y}}\)

If three equal resistors are combined in series to get equivalent resistance of 9 ohm then what is the value of those equal resistors?

A

12 ohm

B

3 ohm

C

4 ohm

D

3.3 ohm

Two identical resistors of 10Ω are connected in parallel in a circuit. This combination is connected with third resistor of 10Ω in series. The equivalent resistance of the combination will be equal to . . . . . . . .?

A

30 Ω

B

5 Ω

C

15 Ω

D

10 Ω

Two 30 Ω resistors are connected in parallel. What resistance should be connected in series with this parallel combination so that the power in each 30 Ω resistor is one fourth of the total power? Indicate your choice of correct answer.

A

30 Ω

B

15 Ω

C

10 Ω

D

120 Ω

Three 10 kΩ resistors are connected in series. A 20 kΩ resistor is connected in parallel across one of the 10 kΩ resistors. The voltage source is 24 V. The total current in the circuit is

A

900 μA

B

9 mA

C

90 mA

D

800 μA

Two resistors of 20 Ω are connected in parallel to each other in a circuit. Then, this combination is added with a resistance of 10 Ω in series. What will be their equivalent resistance?

A

10 Ω

B

30 Ω

C

5 Ω

D

20 Ω

The total resistance for two resistors in parallel is equal to the sum of the two resistors.

A

True

B

False

At a 33kV 50 Hz to a bus a load of 35 MW is connected. To improve the power factor to unity a synchronous phase modifier is connected taking 5 MW. If the SPM is represented as delta connected impedance, where in each phase we have capacitor connected parallel to resistance forming RC parallel network, then the value of this resistance is ___________

A

653.4 Ω

B

753.6 Ω

C

280.4 Ω

D

682 Ω

The graphs between current (I) and voltage (V) for three linear resistors 1, 2 and 3 are given below: If R1, R2 and R3 are the resistances of these resistors, then which one of the following is correct?

A

R₁ > R₂ > R₃

B

R₁ < R₃ < R₂

C

R₃ < R₁ < R₂

D

R₃ > R₂ > R₁

Two resistances of equal value, when connected in parallel, give an equivalent resistance of R. If these resistors are connected in series, the equivalent resistance will be

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