3. Which of the following is not a characteristic of a parallel circuit?

Branch currents are additive

owers are additive

onductances are additive

oltages are additive

4. Voltage across a short circuit will be

nfinity

ero

ity

one of these

5. Two resistors of 10 ohm each are connected in series across a 10 V supply. What will be voltage across each resistors

6. Which of the following material has nearly zero temperature coefficient

Carbon

Copper

Manganin

Aluminiun

7. Which of the following statement is true both for a series and parallel dc circuit?

Branch currents are additive

owers are additive

onductances are additive

oltages are additive

owers are additive

onductances are additive

oltages are additive

8. A coil has a resistance of 100 ohm at 90

^{0}C and at 100

^{0}C resistance is 101 ohm. The temperature coefficient of the wire at 90

^{0}C is

0.01

0.1

0.0001

0.001

9. You have to replace a 1500-ohm in a circuit. But have no 1500-ohm resistor but have several 1000 ohms, which you would connect?

Three in parallel

hree in series

wo in parallel

wo in parallel and one series

10. Two wires A and B have same cross-section made of same material. Ra = 600 ohm, Rb = 100 ohm. The number of times A is longer than B is

11. Three 10 ohm resistors are connected in delta. If this is transformed to a star what will be the resistance of each branch?

10 Ohm

10/2 Ohm

10/3 Ohm

30 Ohm

<

12. Kirchhoff’s current law is applicable to only Closed loops in network

Junctions in a network

Electronic circuits

Electric circuits

13. KVL is concerned with

IR drops

Battery emf

unction volt

oth A & B

14. The algebraic sign of an IR drop is primarily dependent on the

Amount of current flowing through it

Value of R

Direction of flow of current

Battery connection

15. The following formula is used to calculate the total resistance R of a parallel circuit?

R=R1*R2*…Rn/(R1+R2+…Rn)

R=1/R1+1/R2+…1/Rn

1/R=1/R1+1/R2+…1/Rn

R=R1+R2+….Rn

16. What is the formula for Ohm’s law?

V=I+R

I=V*R

V=I/R

I=V/R

<

17.The resistance of a wire will double if we double the

rea

emperature

ength

eight

18. A voltage of 100 V is applied to a circuit of resistance of 10 ohms, the power the dissipated by the resistance will be

100 Watts

500 Watts

1000 Watts

1500 Watts

<

19. Power taken by a resistance of 20 ohms with a flow of 10 A current is

1kW

1.5kW

2.5kW

2kW

20. When the high resistance is connected in parallel with a low resistance, the combined resistance is

igher than the lower resistance

ower than the higher resistance

etween the value of high and low resistance

ess than the lower resistance