AP Polycet (Polytechnic) 2022 Previous Question Paper with Answers And Model Papers With Complete Analysis

Polycet Mock Test

76) The quantity which has the unit ampere-second is

A) electric current
B) electric potential
C) electric charge
D) electromotive force

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C) electric charge

Explanation:Ampere-second is the unit of electric charge (Q = I × t).
Answer:electric charge

77) A bulb is marked 100W and 240V. The resistance of the bulb is

A) 41.66Ω
B) 250Ω
C) 24Ω
D) 576Ω

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D) 576Ω

Explanation:Power $P = \frac{V^2}{R} ⇒ R = \frac{V^2}{P} = \frac{240^2}{100} = \frac{57600}{100} = 576 \, Ω$
Answer:576Ω

78) Electric fuse is used in household circuits for the purpose of

A) measuring electric current
B) maintaining all appliances in series
C) preventing damages due to overloading
D) decreasing resistances of the bulbs

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C) preventing damages due to overloading

Explanation:Fuses protect circuits from overloading or excess current.
Answer:preventing damages due to overloading

79) Four resistors of 2Ω are connected in the form of four sides of a parallelogram. The equivalent resistance between any two opposite corners is

A) 1Ω
B) 2Ω
C) 4Ω
D) 8Ω

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B) 2Ω

80) Ohm’s law is applicable to

A) gaseous conductors
B) semiconductors
C) metallic conductors
D) light emitting diodes

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C) metallic conductors

Explanation:Ohm’s law applies best to metallic conductors (linear V–I relationship).
Answer:metallic conductors

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