G.K. Practice Test: Question Set - 02
1. A parallel A.C circuit in resonance will
- (A) Have
high impedance
- (B) Generate
maximum noise
- (C) Generate
maximum heat
- (D) Generate
maximum power
2. Two resistors of 2 k-ohm value each and 1 watt rating are connected in series. The net resistance and wattage value will be
- (A) 4 k-ohm, 2
watt
- (B) 1 k-ohm, ½
watt
- (C) 4 k-ohm, 1
watt
- (D) 2 k-ohm, 2
watt
3. Sheath is used in the cables to
- (A) Prevent the
moisture from entering the cable
- (B) Provide
the strength to the cable
- (C) Avoid the
chances of the rust on the strands
- (D) Provide
proper insulation
4. The voltage stress is maximum in the cable
- (A) At the
surface of the earth
- (B) At the
surface of the conductor
- (C) At the
surface of the insulator
- (D) At the
surface of the armouring
5. A coil having an inductance of 100 mH is carrying a current of 100 A. If the current is reduced to zero in 0.02 sec, the self induced e.m.f will be
- (A) 125 V
- (B) 250 V
- (C) 375 V
- (D) 500 V
6. Which of the following is the poorest conductor of electricity?
- (A) Silver
- (B) Copper
- (C) Aluminium
- (D) Carbon
7. If the potential difference across a parallel plate air capacitor is increased, the electric field intensity between the plates will increase
- (A) In same
proportion
- (B) Double the
proportion
- (C) As square of
the change
- (D) As square
root of the change
8. The power factor at resonance in R-L-C parallel circuit is
- (A) 0.5 lagging
- (B) 0.5 leading
- (C) Unity
- (D) Zero
9. A 10 cm long conductor is linked with a magnetic field of 1 weber/sq. m. When a current of 10 A passes through it, it will experience a force of
- (A) 0.01 N
- (B) 0.1 N
- (C) 1 N
- (D) 10 N
10. The energy requirement for an industrial application is 1000 kW. hr. If heat losses account for 20%, the total energy to be supplied is
- (A) 1200 kW hr
- (B) 800 kW hr
- (C) 1250 kW hr
- (D) 750 kW hr
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