1. If the number of resistances are connected in series then the equivalent resistance is
(A) decreases.
(B) increases.
(C) remain same.
(D) none of the above.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] B [/accordion-item][/accordion]
2. Which of the following is not a passive component?
(A) Inductor.
(B) Capacitor.
(C) Resistor.
(D) None of the above.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] D [/accordion-item][/accordion]
3. Which of the following is an active component?
(A) Varactor.
(B) Potentiometer.
(C) Capacitor.
(D) Diode.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] D [/accordion-item][/accordion]
4. The wire wound resistor are formed by the winding wire of
(A) tungsten.
(B) nichrome.
(C) manganin or eureka.
(D) copper or aluminium.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] C [/accordion-item][/accordion]
5. The resistance of armature winding depends on
(A) length of conductor.
(B) cross-sectional area of the conductor.
(C) number of conductors.
(D) all of the above.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] D [/accordion-item][/accordion]
6. Heat in a conductor is produced on the passage of electric current due to
(A) reactance.
(B) capacitance.
(C) impedance.
(D) resistance.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] D [/accordion-item][/accordion]
7. The insulation on a current carrying conductor is provided
(A) to prevent leakage of current.
(B) to prevent shock.
(C) both of above factors.
(D) none of above factors.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] C [/accordion-item][/accordion]
8. A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will
(A) decrease.
(B) increase.
(C) remain same.
(D) heater will burn out.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] B [/accordion-item][/accordion]
9. Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as
(A) 5 : 2.
(B) 2 : 5.
(C) 3 : 2.
(D) 2 : 3.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] B [/accordion-item][/accordion]
10. When one leg of parallel circuit is opened out the total current will
(A) reduce.
(B) increase.
(C) decrease.
(D) become zero.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] C [/accordion-item][/accordion]
11. Ohm’s law is not applicable to
(A) linear circuits.
(B) vacuum tubes.
(C) carbon resistors.
(D) high voltage circuits.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] B [/accordion-item][/accordion]
12. Lenz’s law is a consequence of the law of coservation of
(A) mass.
(B) charge.
(C) energy.
(D) momentum.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] C [/accordion-item][/accordion]
13. A real current source has
(A) infinite internal resistance.
(B) Zero internal resistance.
(C) large internal resistance.
(D) small internal resistance.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] C [/accordion-item][/accordion]
14. All good conductors have high
(A) conductance.
(B) resistance.
(C) reluctance.
(D) thermal conductivity.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] A [/accordion-item][/accordion]
15. Voltage dependent resistors are usually made from
(A) charcoal.
(B) silicon carbide.
(C) nichrome.
(D) graphite.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] C [/accordion-item][/accordion]
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