✅ Total Questions: 50
🔢 Each question has 4 options and answers
📘 Subjects Covered: Physics, Chemistry, Mathematics, Electrical Engineering
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📘 Mock Test 7 – WBJEE JELET 2025
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1. The rate of change of velocity is:
A. Displacement
B. Acceleration
C. Speed
D. Jerk
Answer: B
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2. Unit of electric current is:
A. Ohm
B. Coulomb
C. Ampere
D. Watt
Answer: C
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3. Which gas is evolved during photosynthesis?
A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Methane
Answer: B
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4. If a matrix is multiplied by its inverse, the result is:
A. Transpose matrix
B. Zero matrix
C. Identity matrix
D. Diagonal matrix
Answer: C
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5. Kirchhoff’s voltage law is based on:
A. Conservation of charge
B. Conservation of energy
C. Conservation of momentum
D. Conservation of current
Answer: B
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6. The formula of methane is:
A. CH₄
B. C₂H₆
C. C₂H₂
D. C₃H₈
Answer: A
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7. The inverse of sine function is written as:
A. sin
B. sin²
C. arcsin
D. logsin
Answer: C
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8. What is the unit of electric field?
A. N/C
B. J
C. C
D. V
Answer: A
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9. How many electrons are in the outer shell of oxygen?
A. 6
B. 8
C. 4
D. 2
Answer: A
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10. 1000 grams is equal to:
A. 1 kg
B. 10 kg
C. 100 kg
D. 0.1 kg
Answer: A
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11. A half-wave rectifier uses:
A. 1 diode
B. 2 diodes
C. 4 diodes
D. 3 diodes
Answer: A
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12. Current is the rate of flow of:
A. Neutrons
B. Electrons
C. Atoms
D. Protons
Answer: B
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13. Which is an alkaline earth metal?
A. Lithium
B. Beryllium
C. Sodium
D. Potassium
Answer: B
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14. Which function is continuous everywhere?
A. Step function
B. Dirac function
C. Polynomial function
D. Signum function
Answer: C
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15. What is 1 microfarad in farad?
A. F
B. F
C. F
D. F
Answer: A
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16. The atomic number of neon is:
A. 8
B. 10
C. 12
D. 14
Answer: B
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17. Current flowing in one direction is called:
A. AC
B. DC
C. SC
D. TC
Answer: B
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18. Which is a diode application?
A. Voltage regulation
B. Switching
C. Rectification
D. All of these
Answer: D
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19. Derivative of is:
A.
B.
C.
D.
Answer: A
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20. Binary for decimal 9 is:
A. 1000
B. 1001
C. 1010
D. 1100
Answer: B
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21. Which gas turns limewater milky?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Methane
Answer: C
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22. 1 Volt =
A. 1 J/C
B. 1 N/C
C. 1 C/J
D. 1 J/A
Answer: A
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23. Which is a paramagnetic material?
A. Copper
B. Aluminium
C. Bismuth
D. Lead
Answer: B
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24. A zener diode works in:
A. Forward bias
B. Reverse bias
C. Zero bias
D. Both
Answer: B
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25. Solution with pH > 7 is:
A. Neutral
B. Acidic
C. Basic
D. Salt
Answer: C
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26. Number of valence electrons in chlorine:
A. 5
B. 6
C. 7
D. 8
Answer: C
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27. Maximum value of :
A. 0
B. 1
C. -1
D. Infinity
Answer: B
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28. A pure resistor in AC circuit causes:
A. Phase lag
B. Phase lead
C. No phase difference
D. Resonance
Answer: C
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29. What is the full form of LCM?
A. Least Common Multiple
B. Last Common Multiplier
C. Linear Core Method
D. Load Current Meter
Answer: A
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30. Boolean expression A + A = ?
A. A
B. 0
C. 1
D. A̅
Answer: A
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31. Derivative of :
A.
B.
C.
D.
Answer: A
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32. 1 electron volt (eV) =
A. J
B. J
C. J
D. J
Answer: A
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33. A good conductor has:
A. Low resistivity
B. High resistivity
C. High conductivity
D. Both A and C
Answer: D
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34. Power in resistive AC circuit is:
A. Zero
B. Maximum
C. Same as DC
D. Negative
Answer: C
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35. Which gate is called inverter?
A. AND
B. OR
C. NOT
D. NAND
Answer: C
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36. Ideal gas equation:
A. PV = nRT
B. PV = T
C. P = RT/V
D. PV = nT
Answer: A
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37. The output of NAND gate with both inputs 1:
A. 1
B. 0
C. Undefined
D. Depends
Answer: B
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38. The unit of pressure is:
A. Newton
B. Pascal
C. Coulomb
D. Henry
Answer: B
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39. Ohm's law:
A. V = IR
B. V = I + R
C. R = VI
D. I = VR
Answer: A
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40. What does AC stand for?
A. Applied Current
B. Alternating Current
C. Absolute Current
D. Active Current
Answer: B
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41. Which device steps up or steps down voltage?
A. Generator
B. Inverter
C. Transformer
D. Capacitor
Answer: C
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42. Which of these is not a logic gate?
A. AND
B. OR
C. LED
D. XOR
Answer: C
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43. Differentiation of a constant is:
A. Constant
B. Zero
C. Infinity
D. One
Answer: B
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44. What is the main ore of aluminium?
A. Hematite
B. Bauxite
C. Galena
D. Magnetite
Answer: B
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45. Lenz’s law relates to:
A. Resistance
B. Electromagnetic induction
C. Capacitance
D. Magnetic flux
Answer: B
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46. 1024 bytes =
A. 1 KB
B. 1 MB
C. 1 GB
D. 1 TB
Answer: A
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47. Primary source of energy for Earth is:
A. Moon
B. Electricity
C. Sun
D. Coal
Answer: C
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48. The sum of angles of triangle is:
A. 180°
B. 360°
C. 90°
D. 270°
Answer: A
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49. Which of the following is a universal gate?
A. OR
B. AND
C. NAND
D. NOT
Answer: C
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50. A transformer works on:
A. AC only
B. DC only
C. Both
D. None
Answer: A
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