19 Jun 2025 Electrician 1st Sem – NSQF – Module 5 – Magnetism and Capacitors MOCK TEST by admin | posted in: Uncategorized | 0 0% Question 1 of 37 1. Which material is the paramagnetic substance? Graphite Bismuth Copper Cleat wiring Loading... Question 1 of 37Question 2 of 37 2. Which method of magnetization is used to make commercial purpose permanent magnets? Double touch method Divided touch method Induction method Single touch method Loading... Question 2 of 37Question 3 of 37 3. Which electrical quantity is directly proportional to the eddy current? Resistance Frequency Current Voltage Loading... Question 3 of 37Question 4 of 37 4. Which is the correct expression of capacitance 'C' if the electric charge is 'Q' and the voltage is 'V'? C = QV C = 1/QV C = Q/V C = V/Q Loading... Question 4 of 37Question 5 of 37 5. What will happen, if the polarized electrolytic capacitor is reversely connected? Explode due to excessive heat Current is reduced in the circuit Value of capacitance will be increased No effect on the capacitor Loading... Question 5 of 37Question 6 of 37 6. What is the similar term in magnetic circuit for "conductance" in electrical circuit? Permeability Reluctance Reluctivity Permeance Loading... Question 6 of 37Question 7 of 37 7. What indicates the shape of a BH curve (Hysteresis loop) of material? Reluctance of the material Field intensity of the substance Pulling power of the magnetic material Magnetic properties of the material Loading... Question 7 of 37Question 8 of 37 8. What is the unit of capacitance? Coulomb Farad Mho Henry Loading... Question 8 of 37Question 9 of 37 9. Which property of magnet is illustrated? Poles existing property Saturation property Directive property Induction property Loading... Question 9 of 37Question 10 of 37 10. Which defines the flux density is always lagging behind the magnetising force? Magnetic induction Residual magnetism Hysteresis Magnetic intensity Loading... Question 10 of 37Question 11 of 37 11. In which device the air capacitors are used? Loudspeaker Oscillator Radio receiver TV tuner Loading... Question 11 of 37Question 12 of 37 12. Which factor is determining the value of capacitance in capacitor? Area of the plates Material of the plates Thickness of the plates Shape of the plates Loading... Question 12 of 37Question 13 of 37 13. What will be the change in value of capacitance if the distance of the plates are decreased in the capacitor? Becomes zero Decreases Remains same Increases Loading... Question 13 of 37Question 14 of 37 14. What is the unit of permeance? Ampere turns/Weber Weber/Square metre Ampere - turns Weber/Ampere turns Loading... Question 14 of 37Question 15 of 37 15. What is the effect on surrounding metal placed in a magnetic field? Dielectric stress Hysteresis Eddy current Skin effect Loading... Question 15 of 37Question 16 of 37 16. Calculate the total value of capacitance of series capacitor circuit. 10ฮผfd 4ฮผfd 40ฮผfd 15ฮผfd Loading... Question 16 of 37Question 17 of 37 17. What is the effect of inductance if the distance between the turns increases? Decreases Increases Becomes zero Remains same Loading... Question 17 of 37Question 18 of 37 18. What is the unit of Reluctance? Ampere turns / Weber Weber / metre2 Ampere turns / metre2 Weber / metre Loading... Question 18 of 37Question 19 of 37 19. What is the effect of the electrolytic capacitor, if open circuit fault occurs? It will burst at once It will become leaky It will not function It will function normally Loading... Question 19 of 37Question 20 of 37 20. Which is the diamagnetic substance? Manganese Platinum Wood Nickel Loading... Question 20 of 37Question 21 of 37 21. Calculate the total capacitance value in the circuit. 30 ฮผF 70 ฮผF 6 ฮผF 0.16 ฮผF Loading... Question 21 of 37Question 22 of 37 22. What is the part marked as 'X' in B.H curve? Residual magnetism Coercivity Magnetizing force Saturation point Loading... Question 22 of 37Question 23 of 37 23. What is the total inductance if 3 inductors (L1, L2 and L3) are connected in series? LT = L1 + L2 + L3 LT = L1 x L2 x L3 LT = 1/(1/L1 + 1/L2 + 1/L3) LT = (L1 + L2 + L3)/(L1 x L2 x L3) Loading... Question 23 of 37Question 24 of 37 24. Which type of capacitor is used for space electronics? Plastic film type Electrolytic-Tantalum type Ceramic disc type Electrolytic-Aluminium type Loading... Question 24 of 37Question 25 of 37 25. Which rule is applied to find the direction of magnetic fields in a solenoid coil? Flemings left hand rule Right hand palm rule Cork screw rule Flemings right hand rule Loading... Question 25 of 37Question 26 of 37 26. Which type of capacitors are used in RF coupling circuit? Metalized poly propylene Electrolytic Tantalum Monolithic Loading... Question 26 of 37Question 27 of 37 27. Which factor affects the polarity of the electromagnet? Strength of current Direction of current Strength of the magnetic field Length of the coil Loading... Question 27 of 37Question 28 of 37 28. What is the S.I unit of Flux density? Weber/metre Ampere-turns Tesla Weber Loading... Question 28 of 37Question 29 of 37 29. What precaution to be taken before connecting the different voltage rating capacitors in series? Each capacitors voltage drop must be less than its voltage rating Total capacitors value must be less than the lowest value of capacitor Break down voltage of each capacitor must be same All the capacitors must be same manufacturer Loading... Question 29 of 37Question 30 of 37 30. What is the capacitance value of a capacitor that requires 0.5 coulomb to charge to 35 volt? 0.014 F 0.025 F 0.25 F 0.14 F Loading... Question 30 of 37Question 31 of 37 31. How can you increase the pulling strength of an electromagnet? Reduce the number of turns in the coil Increase the B-H curve of the material Increase the field intensity Reduce the current in the coil Loading... Question 31 of 37Question 32 of 37 32. Which is the diamagnetic substance? Steel Water Air Platinum Loading... Question 32 of 37Question 33 of 37 33. What is the function of dielectric insulator in capacitor? Increases the strength of capacitance Protects from short circuit between the plates Helps to hold the charge in capacitor for long period Prevents any current flow between plates Loading... Question 33 of 37Question 34 of 37 34. How the value of capacitance can be decreased? Increasing the plate area Increasing the distance between the plates Using high dielectric constant material Increasing the resistance of the plates Loading... Question 34 of 37Question 35 of 37 35. Which is a paramagnetic substance? Water Glass Steel Air Loading... Question 35 of 37Question 36 of 37 36. Which is the cause for changing the permeability? Field intensity Flux density Length Magneto motive force Loading... Question 36 of 37Question 37 of 37 37. What is the unit of Magneto Motive Force (MMF)? Ampere - M Ampere - turns Ampere / M2 Ampere / turns Loading... Question 37 of 37 Loading...
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