✅ Total Questions: 50
🔢 4 Options per question
📘 Covers: Physics, Chemistry, Mathematics, EEE
📝 Correct answers provided below each question
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📘 Mock Test 4 – WBJEE JELET 2025
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1. Which of the following is a vector quantity?
A. Work
B. Energy
C. Velocity
D. Mass
Answer: C
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2. SI unit of electric potential:
A. Ohm
B. Coulomb
C. Volt
D. Ampere
Answer: C
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3. A body at rest has:
A. Kinetic energy
B. Potential energy
C. No energy
D. Only mass
Answer: B
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4. The value of :
A. 1
B. 0
C. -1
D. Infinity
Answer: B
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5. Which is used as moderator in nuclear reactor?
A. Graphite
B. Sodium
C. Uranium
D. Plutonium
Answer: A
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6. The chemical name of baking soda is:
A. Sodium carbonate
B. Sodium bicarbonate
C. Calcium carbonate
D. Sodium hydroxide
Answer: B
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7. Resistance is directly proportional to:
A. Voltage
B. Area
C. Length
D. Power
Answer: C
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8. Kirchhoff's second law deals with:
A. Voltage
B. Current
C. Power
D. Resistance
Answer: A
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9. Find :
A.
B.
C.
D.
Answer: C
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10. Most reactive metal among the following:
A. Copper
B. Zinc
C. Iron
D. Potassium
Answer: D
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11. Binary equivalent of decimal 8:
A. 1000
B. 0101
C. 1110
D. 1010
Answer: A
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12. What does LED stand for?
A. Light Emitting Diode
B. Light Energy Display
C. Laser Emission Diode
D. Low Energy Diode
Answer: A
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13. One kilowatt =
A. 1000 watts
B. 100 watts
C. 10 watts
D. 1 watt
Answer: A
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14. How many electrons can the K shell hold?
A. 2
B. 8
C. 18
D. 32
Answer: A
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15. Boolean expression for NOT gate:
A. A
B. A + B
C. A̅
D. AB
Answer: C
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16. The unit of magnetic flux density is:
A. Weber
B. Tesla
C. Henry
D. Ampere
Answer: B
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17. Which element is most electronegative?
A. Chlorine
B. Oxygen
C. Fluorine
D. Nitrogen
Answer: C
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18. Frequency × Time period = ?
A. 1
B. 0
C. ∞
D. Frequency
Answer: A
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19. AC is represented mathematically as:
A.
B.
C.
D.
Answer: A
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20. Integration of :
A.
B.
C.
D.
Answer: A
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21. Which diode emits light?
A. Zener
B. LED
C. Photodiode
D. Tunnel diode
Answer: B
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22. What is the value of ?
A. 0
B. 1
C. e
D. Undefined
Answer: B
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23. Power = Voltage × ____?
A. Resistance
B. Charge
C. Current
D. Capacitance
Answer: C
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24. Which device stores electric charge?
A. Resistor
B. Capacitor
C. Inductor
D. Transformer
Answer: B
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25. What is oxidation?
A. Loss of electrons
B. Gain of electrons
C. Loss of protons
D. Gain of neutrons
Answer: A
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26. A moving charge produces:
A. Electric field only
B. Magnetic field only
C. Both
D. None
Answer: C
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27. The derivative of :
A.
B.
C.
D.
Answer: A
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28. The output of an OR gate is 1 when:
A. All inputs are 0
B. All inputs are 1
C. At least one input is 1
D. Inputs differ
Answer: C
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29. Total resistance in series:
A. Sum of reciprocals
B. Product
C. Sum
D. Zero
Answer: C
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30. The derivative of constant ‘a’ is:
A. a
B. 0
C. 1
D. Not defined
Answer: B
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31. 1 horsepower = ? watts
A. 100
B. 550
C. 746
D. 1000
Answer: C
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32. Acid + Base → ?
A. Salt + Water
B. Water only
C. Salt only
D. Acid salt
Answer: A
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33. Which of the following is not a conductor?
A. Copper
B. Aluminium
C. Plastic
D. Iron
Answer: C
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34. Impedance in AC circuit is:
A. Resistance only
B. Inductive reactance
C. Vector sum of R, XL, and XC
D. Capacitance
Answer: C
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35. 1 mole of any gas at STP = ?
A. 22.4 L
B. 1 L
C. 24 L
D. 11.2 L
Answer: A
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36. A parallel circuit has:
A. Same current
B. Same voltage
C. Same resistance
D. Equal power
Answer: B
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37. Device used to measure current:
A. Voltmeter
B. Ammeter
C. Wattmeter
D. Ohmmeter
Answer: B
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38. RMS value of voltage:
A.
B.
C.
D.
Answer: C
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39. Reactance is measured in:
A. Ohm
B. Volt
C. Ampere
D. Farad
Answer: A
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40. A diode in reverse bias acts as:
A. Conductor
B. Resistor
C. Open switch
D. Short circuit
Answer: C
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41. Which law gives relation of P, V, T in gases?
A. Avogadro’s Law
B. Boyle’s Law
C. Charles’s Law
D. Ideal Gas Law
Answer: D
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42. Binary equivalent of decimal 6:
A. 110
B. 101
C. 1001
D. 111
Answer: A
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43. In an OR gate, 0 + 0 = ?
A. 0
B. 1
C. Undefined
D. 2
Answer: A
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44. An ideal capacitor has:
A. Resistance
B. Leakage
C. No energy storage
D. Infinite resistance
Answer: D
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45. Thevenin’s theorem converts circuit to:
A. Voltage source + resistance
B. Current source
C. Inductive load
D. Capacitive load
Answer: A
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46. The formula for average velocity:
A.
B.
C.
D.
Answer: A
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47. AC stands for:
A. Active Current
B. Alternative Current
C. Alternating Current
D. Absolute Current
Answer: C
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48. The sum of angles in triangle:
A. 90°
B. 360°
C. 180°
D. 270°
Answer: C
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49. Diode allows current to flow in:
A. Both directions
B. Reverse only
C. Forward only
D. None
Answer: C
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50. A logic gate with only one input and one output:
A. AND
B. OR
C. NOT
D. NAND
Answer: C
