Two identical resistors of 20 ohm each are connected in parallel. This combination, in turn, is connected to a 10 ohm resister. The equivalent resistance of the combination will be

Two identical resistors, each of 10 ohm, are connected in parallel. This combination, in turn, is connected to a third resistor of 10 ohm. The equivalent resistance of the combination is ___.

A

30 ohm

B

5 ohm

C

15 ohm

D

10 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

When two identical and parallel intake roadways are changed to three identical and parallel intake roadways of same size and length, the ratio of new equivalent resistance to old equivalent resistance will be

A

0.44

B

0.67

C

1.5

D

0.82

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

A

R

B

4R

C

2R

D

R/2

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

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

Ashutosh has a box containing 8 identical red balls, 9 identical blue balls and 10 identical green balls. He is required to distribute all these balls into three bags A, B and C such that the total number of balls in bag A is more than that in bag B, which, in turn, is more than that in bag C. Moreover, he needs to ensure that the number or red balls in bag A is more than that in bag B which in turn is more than that in bag C, and similarly for the blue and green balls. In how many ways can he do this? Each bag must contain at least one ball of each type.

A

24

B

18

C

16

D

36

Study the given information carefully and answer the question given below: Shikhar walked 18 km towards east, took right turn and walked 20 km. He then took a left turn and walked 25 km. Then, he took a left turn walked 20 km. Then, he took a right turn and walked 10 km. then, he took a left turn and walked 24 km. Finally he took a left turn and walked 35 km. How far was he from the starting point?

A

22 km

B

25 km

C

28 km

D

30 km

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 20 ohm each are connected in parallel. This combination, in turn, is connected to a 10 ohm resister. The equivalent resistance of the combination will be

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