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

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

The parallel combination of a 470 Ω resistor and a 680 Ω resistor is in series with the parallel combination of four 2 kΩ resistors. The total resistance is

A

1,650 Ω

B

1,078 Ω

C

77.8 Ω

D

778 Ω

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

A series circuit consists of three resistors. Two resistors are 1.2 kΩ each. The total resistance is 12 kΩ. The value of the third resistor is

A

9,600 Ω

B

960 Ω

C

1.2 kΩ

D

Cannot be determined

There is a total of 800 mA of current into four parallel resistors. The currents through three of the resistors are 40 mA, 70 mA, and 200 mA. The current through the fourth resistor is

A

490 mA

B

800 mA

C

310 mA

D

0 A

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

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

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