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

Four resistors of equal value are connected in parallel. If the total voltage is 15 V and the total resistance is 600 Ω, the current through each parallel resistor is

A

25 mA

B

100 mA

C

6.25 mA

D

200 mA

A certain circuit is composed of two parallel resistors. The total resistance is 1,403 Ω. One of the resistors is 2 kΩ. The other resistor value is

A

1,403 Ω

B

4.7 kΩ

C

2 kΩ

D

3,403 Ω

Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance

A

Is less than 6 kΩ

B

Is greater than 1.2 kΩ

C

Is less than 1.2 kΩ

D

Is less than 600 Ω

Suppose voltage V is applied across a resistance R. The power dissipated in the resistance is P. Now the same voltage V is applied across a parallel combination of three equal resistors each of resistance R. Then the power dissipated in the second case will be

A

P

B

3P

C

p\/3

D

2p\/ 3

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 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

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

Quantity I: In a party, 75% of the total number of female is equal to 50% of the total number of male then the number of female is what percentage of the total number of person in the party? Quantity II: In a school, 66.66% of the total number of girls is equal to 40% of the total number of boys then the total number of girls is what percentage of the total number of students of the school?

A

Quantity 1 > Quantity 2

B

Quantity 1 ≥ Quantity 2

C

Quantity 1 < Quantity 2

D

Quantity 1 ≤ Quantity 2

E

Quantity 1 = Quantity 2

Total resistance in welding is composed of: (i) Resistance of electrode (ii) Contact resistance between electrode and work piece (iii) Contact resistance between two work piece plates (iv) Resistance of work piece Which of the following is correct?

A

i

B

ii, iii and iv

C

ii and iv

D

I, ii, iii and iv

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

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