Objective Questions on Electrical Current Electricity - Set 05 - ObjectiveBooks

# Practice Test: Question Set - 05

1. Which of the following materials has a negative temperature coefficient of resistance?
(A) Copper
(B) Aluminum
(C) Carbon
(D) Brass

2. A resistance having rating 10 ohms, 10 W is likely to be a
(A) Metallic resistor
(B) Carbon resistor
(C) Wire wound resistor
(D) Variable resistor

3. What is the answer to this question?The resistance of a few meters of wire conductor in closed electrical circuit is
(A) Practically zero
(B) Low
(C) High
(D) Very high

4. 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

5. A glass rod when rubbed with silk cloth is charged because
(A) It takes in proton
(B) Its atoms are removed
(C) It gives away electrons
(D) It gives away positive charge

6. Bulbs in street lighting are all connected in
(A) Parallel
(B) Series
(C) Series-parallel
(D) End-to-end

7. Which method can be used for absolute measurement of resistances?
(A) Lorentz method
(B) Raleigh method
(C) Ohm's law method
(D) Wheatstone bridge method

8. All good conductors have high
(A) Conductance
(B) Resistance
(C) Reluctance
(D) Thermal conductivity

9. When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is
(A) 1 n-mho
(B) 106 mho
(C) 1 milli-mho
(D) None of the above

10. One Newton meter is same as
(A) One watt
(B) One joule
(C) Five joules
(D) One joule second

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