Electricity And Magnetism - Study Mode
[#196] A fuse is used in main electric supply as a safety device. Which one of the following statements about the fuse is correct?
Correct Answer
(C) It must have a low melting point
[#197] Consider the following statements regarding a motor car battery. 1. The voltage is usually 12V. 2. Electrolyte used is hydrochloric acid. 3. Electrodes are lead and copper. 4. Capacity is expressed in amperehour. Which of the above statements are correct?
Correct Answer
(D) Only 1 and 4
[#198] Which of the following gases is used to fill an electric bulb?
Correct Answer
(D) Ar and N 2
[#199] Assertion (A) The ferromagnetic substances do not obey Curie's law. Reason (R) At Curie point a ferromagnetic substance start behaving as a paramagnetic substance.
Correct Answer
(B) Both A and R are true, but R is not the correct explanation of A
[#200] The value of resistance of an absolute ammeter should be:
Correct Answer
(C) very low