A. to prevent leakage of current
B. to prevent shock
C. both of above factors
D. none of above factors
Correct Answer: both of above factors ✔
Last Updated: June 26, 2018
Related MCQs
- The hot resistance of the bulb’s filament is higher than its cold resistance because the temperature co-efficient of the filament is__________?
- A closed switch has a resistance of__________?
- Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across__________?
- The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true__________?
- Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open__________?
- If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes__________?
- If a parallel circuit is opened in the main line, the current__________?
- The resistance of a few meters of wire conductor in closed electrical circuit is__________?
- Which of the following statement is true__________?
- A 3 Q resistor having 2 A current will dissipate the power of__________?
- The filament of an electric bulb is made of__________?
- In a series circuit with unequal resistances__________?
- The minimum charge on an ion is__________?
- The rating of a fuse wire is always expressed in__________?
- Insulating materials have the function of__________?
- Insulating materials have the function of__________?
- Varistors are__________?
- Which one of the following does not have negative temperature co-efficient __________?
- A resistance having rating 10 ohms, 10 W is likely to be a__________?
- All of the following are equivalent to watt except__________?
- For which of the following ‘ampere second’ could be the unit ?
- Which is the best conductor of electricity __________?
- Ohm’s law is not applicable to__________?
- Which of the following materials has a negative temperature co-efficient of resistance?
- Which of the following statement is true both for a series and a parallel D. C. circuit?
- Two resistors are said to be connected in series when__________?
- You have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect__________?
- Which of the following material has nearly zero temperature co-efficient of resistance_________?
- Current velocity through a copper conductor is__________?
- A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is__________?
- Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 25 Q. If the same four wires are connected is series the effective resistance will be________?
- 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 light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is__________?
- In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is
- An instrument which detects electric current is known as__________?
- The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around__________?
- With rise in temperature the resistance of semi-conductors__________?
- With rise in temperature the resistance of pure metals__________?
- The resistance of a conductor varies inversely as__________?
- Conductance is reciprocal of__________?
- The property of a conductor due to which it passes current is called__________?
- Out of the following which is an insulating material__________?
- Out of the following which is not a poor conductor__________?
- The substances which have a large number of free electrons and offer a low resistance are called____?
- Electric pressure is also called________?
- Which of the following quantities consists of SI unit as WATT ?
- Which of the following has no units?
- Which quantity consists of a unit 1KWh ?
- Which quantity should be measured by the voltmeter ?
- Internal resistance of ideal current source is ?
- Internal resistance of ideal voltage source is ?