1. A time-varying current, I(t) = (t2 + 5t + 6)A is passing through a surface with a cross-section area of A = 10 cm2. What amount of charge has flown through the surface in the 10th second?
- 143.83 C
- 643.33 C
- 168.83 C
- 151.33 C
Answer :- a
2. Let’s say V1 and V2 are two constant voltages maintained by external voltage sources. Given that V1 has a higher potential than V2. An electron(e) is placed between the line joining V1 and V2. So, how will the electron move?
- The electron will move towards V1.
- The electron will move towards V2.
- The electron will stay at rest.
- The electron will move perpendicular to the line joining V1 and V2.
Answer :- a
3. In the circuit given below, find the current I1 (in Amperes) given that I = 3 mA
- 2 mA
- 2/3 mA
- 1 mA
- 3 mA
Answer :- a
4. Consider a flow of electrons across a given cross-section from points A to B over a certain time interval. Given that the number of electrons passing through the cross-section over a period of 5 seconds is 6.25×1019. Calculate the current flowing through the given cross-section.
- 1 A flowing from B to A
- 2 A flowing from A to B
- 2 A flowing from B to A
- None of the above
Answer :- c
5. Find the voltage drop across the current source in the diagram below. Consider R1=R2=1Ω.
- 6 V
- 15 V
- 0 V
- 24V
Answer :- d
6. In the figure below, determine the voltage V1 at 𝑡 = 5ms . The capacitor voltage and inductor current are zero at 𝑡 = 0.
Consider L=0.4 H and C = 2μF
- 0.5 V
- -0.5 V
- 2.5 V
- 2 V
Answer :- a
7.
Consider a Resistor shown above. If we apply 5 volts across it, we observe x Ampere passing current through it. If we pass 7 A through the resistor, we can see a voltage drop of (x + 2) across it. Now, find its Resistance.
- 1 Ω
- 5 Ω
- -7 Ω
- Both B and C
Answer :- a
8.
In the figure shown above, there are constant current and voltage sources with variable resistance. If someone Increases the resistance Linearly with respect to time, as shown above. What does the graph of voltage across the current source Vi look like?
Answer :- c
9. Find the voltage V1 in the circuit given below. i1 = 6 sin(2t), i2 = 5 sin (2t)
- -45 sin (2t) V
- -6 sin (2t) V
- 6 sin (2t) V
- 54 sin (2t) V
Answer :- b
10. Find voltages V1 and V2 in the below circuit:-
Answer :- d
11. Find the Voltage across the following shape if resistivity of the material is ρ and current passing is I.
Answer :- b
12. Find the voltage across 2𝑘𝛺 in the below circuit.
- 1.27 V
- 1.9 V
- 3.18 V
- 5.181 V
Answer :- a