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
- (A) Lead and zinc
- (B) Chromium and vanadium
- (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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