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1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q1 ⇒ If Bmax is the maximum flux density, hysteresis loss is proportional to B1.6max [other wrong options] [Discuss in forum] Bmax B2max B3max |
Q2 ⇒ Which inductor is linear? Air cored [other wrong options] [Discuss in forum] Cast iron cored Sheet steel cored Iron alloy cored |
Q3 ⇒ Electric dipole moment is expressed in debye unit. TRUE [other wrong options] [Discuss in forum] FALSE |
Q4 ⇒ Assertion (A): Hall effect is used to determine whether the semi- conductor is p or n type. Reason (R): Under the influence of field, holes and electrons move in opposite direction. Both A and R are true and R is correct explanation of A [other wrong options] [Discuss in forum] Both A and R are true but R is not correct explanation of A A is true but R is false A is false but R is true |
Q5 ⇒ Schrodinger wave equation is partial differential equation. TRUE [other wrong options] [Discuss in forum] FALSE |
Q6 ⇒ Consider the following materials
1, 4, 2, 3 [other wrong options] [Discuss in forum] 1, 4, 3, 2 4, 1, 3, 2 4, 1, 2, 3 |
Q7 ⇒ For a diamagnetic material, μr = 1. TRUE [other wrong options] [Discuss in forum] FALSE |
Q8 ⇒ As the atoms of rare gases become larger, electronic polarizability remains the same [other wrong options] [Discuss in forum] increases decreases may increase or decrease |
Q9 ⇒ The carrier mobility in a semiconductor is 0.4 m2/Vs. Its diffusion constant at 300 K will be (in m2/s) 0.01 [other wrong options] [Discuss in forum] 0.4 0.16 0.04 |
Q10 ⇒ Resistivity of copper is lower than that of nickel. When a small percentage of copper is added to nickel, the resistivity increases [other wrong options] [Discuss in forum] decreases may increase or decrease remains the same |
Q11 ⇒ Dielectric constant, under the condition of alternating fields, is a complex quantity. TRUE [other wrong options] [Discuss in forum] FALSE |
Q12 ⇒ Transformer oil is refined mineral oil [other wrong options] [Discuss in forum] refined vegetable oil mixture of vegetable and mineral oil none of the above |
Q13 ⇒ Which capacitor-store higher amount of energy? Mica capacitor [other wrong options] [Discuss in forum] Air capacitor Paper capacitor Plastic film capacitor |
Q14 ⇒ Assertion (A): Electronic and Ionic polarization in a polyatomic gas are independent of temperature. Reason (R): The orientation polarization is independent of temperature. A is true but R is false [other wrong options] [Discuss in forum] Both A and R are true and R is correct explanation of A Both A and R are true but R is not correct explanation of A A is false but R is true |
Q15 ⇒ In atomic physics, a state with l = 0 is called p state. FALSE [other wrong options] [Discuss in forum] TRUE |
Q16 ⇒ There is no hysteresis phenomenon is any dielectric material. FALSE [other wrong options] [Discuss in forum] TRUE |
Q17 ⇒ Assertion (A): Power loss in a conductor of resistance P = I2R. Reason (R): When a conductor is carrying current with current density J as a result of applied field E, then heat developed/m3/ second = JE. Both A and R are true and R is correct explanation of A [other wrong options] [Discuss in forum] Both A and R are true but R is not correct explanation of A A is true but R is false A is false but R is true |
Q18 ⇒ In metals, the average drift velocity of electron per unit field is called mobility. TRUE [other wrong options] [Discuss in forum] FALSE |
Q19 ⇒ Silicon and germanium atoms combine orderly into array of atoms located in repetitive geometric pattern. This pattern is called crystal [other wrong options] [Discuss in forum] covalent bond molecule valence bond |
Q20 ⇒ When subjected to alternating stresses, an insulating material is characterised by complex dielectric constant ∈'r - j∈"r . In such materials, the dielectric losses under alternating stress is proportional ∈"r [other wrong options] [Discuss in forum] both ∈'r and ∈"r ∈'r (∈"r)2 |
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