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Electronics and Communication Engineering (ECE) Exam  >  Electronics and Communication Engineering (ECE) Tests  >  Test: Basic & Electric Circuits- 1 - Electronics and Communication Engineering (ECE) MCQ

Test: Basic & Electric Circuits- 1 - Electronics and Communication Engineering (ECE) MCQ


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10 Questions MCQ Test - Test: Basic & Electric Circuits- 1

Test: Basic & Electric Circuits- 1 for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Test: Basic & Electric Circuits- 1 questions and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus.The Test: Basic & Electric Circuits- 1 MCQs are made for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Basic & Electric Circuits- 1 below.
Solutions of Test: Basic & Electric Circuits- 1 questions in English are available as part of our course for Electronics and Communication Engineering (ECE) & Test: Basic & Electric Circuits- 1 solutions in Hindi for Electronics and Communication Engineering (ECE) course. Download more important topics, notes, lectures and mock test series for Electronics and Communication Engineering (ECE) Exam by signing up for free. Attempt Test: Basic & Electric Circuits- 1 | 10 questions in 30 minutes | Mock test for Electronics and Communication Engineering (ECE) preparation | Free important questions MCQ to study for Electronics and Communication Engineering (ECE) Exam | Download free PDF with solutions
Test: Basic & Electric Circuits- 1 - Question 1
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If the power supplied by the 20 V voltage source shown in figure below is 60 W then, the power supplied by the unknown circuit element (x) will be 

Detailed Solution for Test: Basic & Electric Circuits- 1 - Question 1

we know that

Test: Basic & Electric Circuits- 1 - Question 2
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In the network of figure shown below, I1 = 0.05 A, I2 = 0.1 A , R = 50 Ω. The unknown current source has strength of i, If 100 J of energy is delivered to I2 in 1 min, the magnitude of i will be

Detailed Solution for Test: Basic & Electric Circuits- 1 - Question 2

energy dissipated in where p=vi

Since power is constant, therefore

Applying KCL at node v, we have

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Test: Basic & Electric Circuits- 1 - Question 3
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The energy required to move 120 C charge through 3 V is

Detailed Solution for Test: Basic & Electric Circuits- 1 - Question 3

W=QV=120 X 3 = 360J

Test: Basic & Electric Circuits- 1 - Question 4
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For a given voltage, four heating coils will produce maximum heat, when connected
Detailed Solution for Test: Basic & Electric Circuits- 1 - Question 4

Maximum heat produced is

for P to be maximum, Req should be minimum which is minimum of all four coils are connected in parallel.

Test: Basic & Electric Circuits- 1 - Question 5
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Given figure shows a plot of d.c. voltage applied to a resistor of 5 Ω for 15 seconds. The total energy consumed by the resistor is
Detailed Solution for Test: Basic & Electric Circuits- 1 - Question 5

energy = power x time

Hence, the heat consumed by the resistor

= 1140 J

Test: Basic & Electric Circuits- 1 - Question 6
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The charge in a capacitor is given by

 

if the voltage across this capacitor be v(t) = sin t, the current i(t) through the capacitor is
Detailed Solution for Test: Basic & Electric Circuits- 1 - Question 6

The current through.the capacitor is 

Test: Basic & Electric Circuits- 1 - Question 7
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The unit of reactive power is
Detailed Solution for Test: Basic & Electric Circuits- 1 - Question 7

Active power does do work, so it is the real axis. The unit for power is the watt (symbol: W). Apparent power is often expressed in volt-amperes (VA) since it is the product of rms voltage and rms current. The unit for reactive power is var, which stands for volt-ampere reactive.

Test: Basic & Electric Circuits- 1 - Question 8
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The unit of electrical energy is
Test: Basic & Electric Circuits- 1 - Question 9
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The given signal is
Detailed Solution for Test: Basic & Electric Circuits- 1 - Question 9

Given signal is a ramp signal f(t) = A(t), which is neither an energy signal nor a power signal.

Test: Basic & Electric Circuits- 1 - Question 10
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The two voltage sources connected in parallel as shown below, must satisfy the conditions
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