Lakshya Education MCQs

Question: Working of safety fuses depends upon1. magnetic effect of the current2. chemical effect of the current3. magnitude of the current4. heating effect of the currentSelect the correct answer using the code given below.
Options:
A.1, 2, 3 and 4
B.1, 2 and 3 only
C.3 and 4 only
D.4 only
Answer: Option C

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More Questions on This Topic :

Question 1. During thunderstorm you are travelling in a car. To protect yourself from the lightning you will have to
  1.    Remain in the car
  2.    Get out of the car and lie flat in the ground
  3.    Abandon the car and take shelter under a nearby tree
  4.    Touch the nearest electric pole
Answer: Option A
Question 2. Safety fuse wire used in domestic electrical appliances is made of metal of low
  1.    Resistance
  2.    Melting point
  3.    Specific gravity
  4.    Conductance
Answer: Option B
Question 3. The unit of electrical power is
  1.    Bolt
  2.    Watt
  3.    Kilowatt hour
  4.    Ampere
Answer: Option B
Question 4. The fuse in an electric circuit is connected in
  1.    Series with neutral
  2.    Parallel to live
  3.    Parallel to neutral
  4.    Series with live
Answer: Option D
Question 5. Find the current (in A) when a charge of 1200C flows in 6 seconds.
  1.    7200
  2.    200
  3.    100
  4.    3600
Answer: Option B
Question 6. Metals are good conductors of electricity because
  1.    The atoms are lightly packed
  2.    They contain free electrons
  3.    They have high melting point
  4.    All the above
Answer: Option B

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