Current Electricity Objective Questions and Answers - Set 08 - ObjectiveBooks

# Practice Test: Question Set - 08

1. When current flows through heater coil it glows but supply wiring does not glow because
(A) Current through supply line flows at slower speed
(B) Supply wiring is covered with insulation layer
(C) Resistance of heater coil is more than the supply wires
(D) Supply wires are made of superior material

2. The filament of an electric bulb is made of
(A) Carbon
(B) Aluminium
(C) Tungsten
(D) Nickel

3. Out of the following which is not a poor conductor?
(A) Cast iron
(B) Copper
(C) Carbon
(D) Tungsten

4. The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other?
(A) 18 Q
(B) 36 Q
(C) 48 Q
(D) 64 Q

5. The minimum charge on an ion is
(A) Equal to the atomic number of the atom
(B) Equal to the charge of an electron
(C) Equal to the charge of the number of electrons in an atom (#) zero
(D) None of these

6. Whether circuit may be AC. or D.C. one, following is most effective in reducing the magnitude of the current.
(A) Reactor
(B) Capacitor
(C) Inductor
(D) Resistor

7. Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be
(A) 9 times
(B) 1/9 times
(C) 1/3 times
(D) 3 times

8. Nichrome wire is an alloy of
(C) Nickel and chromium
(D) Copper and silver

9. The property of a conductor due to which it passes current is called
(A) Resistance
(B) Reluctance
(C) Conductance
(D) Inductance

10. Which is the best conductor of electricity?
(A) Iron
(B) Silver
(C) Copper
(D) Carbon

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