CET DC Circuit Analysis & Theory 2

Question 1

Three resistors of 10 Ω, 20 Ω, and 30 Ω are connected in series across a 120 V supply. What is the voltage drop across the 20 Ω resistor?

Accepted Answer

40 V

Answer

20 V

Answer

60 V

Answer

80 V

Question 2

Which law states that the algebraic sum of all voltages around any closed loop in a circuit equals zero?

Accepted Answer

Kirchhoff's Voltage Law

Answer

Ohm's Law

Answer

Kirchhoff's Current Law

Answer

Norton's Theorem

Question 3

A 60 W lamp operates at 120 V. What is its resistance?

Accepted Answer

240 Ω

Answer

120 Ω

Answer

180 Ω

Answer

360 Ω

Question 4

In a voltage divider with R1 = 4 kΩ and R2 = 1 kΩ connected to 25 V, what is the output voltage across R2?

Accepted Answer

5 V

Answer

1 V

Answer

20 V

Answer

25 V

Question 5

What happens to total resistance when additional resistors are added in series?

Accepted Answer

Increases

Answer

Decreases

Answer

Remains the same

Answer

Becomes zero

Question 6

A circuit has a 9 V battery and a 3 Ω internal resistance with a 6 Ω external load. What current flows through the circuit?

Accepted Answer

1 A

Answer

0.5 A

Answer

1.5 A

Answer

3 A

Question 7

Power dissipated in a resistor doubles when the current through it is:

Accepted Answer

Increased by √2

Answer

Doubled

Answer

Halved

Answer

Multiplied by 4