Current electricity

1. The thickness of insulation provided on the conductor depends on

The magnitude of voltage on the conductor
The magnitude of current flowing through it
Both (A) and (B)
None of the above

Subscribe on YouTube

title="The thickness of insulation provided on the conductor depends
Join Our Telegram Channel
on" class="read-more button" href="https://exam.pscnotes.com/mcq/the-thickness-of-insulation-provided-on-the-conductor-depends-on/#more-50630">Detailed SolutionThe thickness of insulation provided on the conductor depends on

2. Switching of a lamp in house produces noise in the radio. This is because switching operation produces

Arcs across separating contacts
Mechanical noise of high intensity
Both mechanical noise and arc between contacts
None of the above

Join Our Telegram Channel
Subscribe on YouTube
lamp in house produces noise in the radio. This is because switching operation produces" class="read-more button" href="https://exam.pscnotes.com/mcq/switching-of-a-lamp-in-house-produces-noise-in-the-radio-this-is-because-switching-operation-produces/#more-50619">Detailed SolutionSwitching of a lamp in house produces noise in the radio. This is because switching operation produces

3. When electric current passes through a metallic conductor, its temperature rises. This is due to

Collisions between conduction electrons and atoms
The release of conduction electrons from parent atoms
Mutual collisions between metal atoms
Mutual collisions between conducting electrons

Join Our Telegram Channel

11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube
class="read-more button" href="https://exam.pscnotes.com/mcq/when-electric-current-passes-through-a-metallic-conductor-its-temperature-rises-this-is-due-to/#more-50316">Detailed SolutionWhen electric current passes through a metallic conductor, its temperature rises. This is due to

4. Nichrome wire is an alloy of

Lead and zinc
Chromium and vanadium
Nickel and chromium
Copper and silver

Join Our Telegram Channel
Subscribe on YouTube
of" class="read-more button" href="https://exam.pscnotes.com/mcq/nichrome-wire-is-an-alloy-of/#more-50169">Detailed SolutionNichrome wire is an alloy of

5. Three 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners?

$$ rac{3}{2}Omega $$
6 $$Omega $$
4 $$Omega $$
$$ rac{8}{3}Omega $$

Detailed SolutionThree 6

Join Our Telegram Channel
288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube
ohm resistors are connected to form a triangle. What is the resistance between any two corners?

6. The number of electrons in the outer most orbit of carbon atom is

3
4
6
7

Join Our Telegram Channel
Subscribe on YouTube
href="https://exam.pscnotes.com/mcq/the-number-of-electrons-in-the-outer-most-orbit-of-carbon-atom-is/#more-49331">Detailed SolutionThe number of electrons in the outer most orbit of carbon atom is

7. Ohm’s law is not applicable to

Semiconductors
D.
circuits C. Small resistors
High currents

Join Our Telegram Channel
Subscribe on YouTube
button" href="https://exam.pscnotes.com/mcq/ohms-law-is-not-applicable-to/#more-49031">Detailed SolutionOhm’s law is not applicable to

8. With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals

10 W
20 W
40 W
60 W

Join Our Telegram Channel

class="youtube-icon"> Subscribe on YouTube supplied by the voltage source equals" class="read-more button" href="https://exam.pscnotes.com/mcq/with-three-resistances-connected-in-parallel-if-each-dissipates-20-w-the-total-power-supplied-by-the-voltage-source-equals/#more-49022">Detailed SolutionWith three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals

9. Conductance is reciprocal of

Resistance
Inductance
Reluctance
Capacitance

Detailed SolutionConductance is reciprocal of

Join Our Telegram Channel
Subscribe on YouTube

10. Which of the following materials has a negative temperature coefficient of resistance?

Copper
Aluminum
Carbon
Brass

Join Our Telegram Channel

89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube href="https://exam.pscnotes.com/mcq/which-of-the-following-materials-has-a-negative-temperature-coefficient-of-resistance/#more-48817">Detailed SolutionWhich of the following materials has a negative temperature coefficient of resistance?

Page 1Page 2Page 3Page 4Page 5
Test 1Test 2