WBJEE JELET 2025 – Full Syllabus Mock Test 3

WBJEE JELET 2025 – Full Syllabus Mock Test 3

1. Which of the following is the unit of inductance?
   • Farad
   • Ohm
   • ✅ Henry
   • Tesla
2. Boolean expression A·(A + B) is equal to:
   • A + B
   • B
   • ✅ A
   • 0
3. Which law gives the relation between voltage and current in an inductor?
   • ✅ Faraday’s Law
   • Ohm’s Law
   • Lenz’s Law
   • Gauss's Law
4. Integration of sin(x) dx is:
   • −cos(x)
   • ✅ −cos(x) + C
   • cos(x)
   • −sin(x) + C
5. Binary equivalent of decimal 15:
   • ✅ 1111
   • 1010
   • 1100
   • 1001
6. Which device stores energy in electric field?
   • Inductor
   • Resistor
   • ✅ Capacitor
   • Transformer
7. The speed of light in vacuum is:
   • 2.0 × 10⁸ m/s
   • ✅ 3.0 × 10⁸ m/s
   • 1.5 × 10⁸ m/s
   • 2.5 × 10⁸ m/s
8. The inverse Laplace of 1/s is:
   • 1
   • e^−st
   • t
   • ✅ Unit step function
9. Which transistor configuration provides maximum voltage gain?
   • ✅ Common Emitter
   • Common Base
   • Common Collector
   • Emitter Follower
10. Logic gate used to detect inequality:
    • AND
    • ✅ XOR
    • NOR
    • XNOR
11. Ideal op-amp has:
    • Infinite output
    • ✅ Infinite input impedance
    • Zero input impedance
    • High power consumption
12. Ohm's law is not applicable to:
    • Resistors
    • ✅ Vacuum tubes
    • Conductors
    • Alloys
13. Unit of electric potential:
    • Ampere
    • ✅ Volt
    • Watt
    • Coulomb
14. Speed of sound in air at room temperature:
    • 250 m/s
    • ✅ 343 m/s
    • 280 m/s
    • 300 m/s
15. In Boolean algebra, A · 0 = ?
    • A
    • 1
    • ✅ 0
    • A'
16. Which law explains electromagnetic induction?
    • ✅ Faraday’s Law
    • Ohm’s Law
    • Newton’s Law
    • Hooke’s Law
17. Which gate gives output 0 when inputs are same?
    • AND
    • OR
    • ✅ XOR
    • NAND
18. Binary number 1001 = decimal?
    • 7
    • 8
    • ✅ 9
    • 10
19. Energy stored in an inductor is:
    • 1/2 CV²
    • ✅ 1/2 LI²
    • 1/2 IR²
    • VQ
20. Frequency × Time = ?
    • Energy
    • Velocity
    • ✅ 1
    • Amplitude
21. Unit of capacitance:
    • Henry
    • Volt
    • ✅ Farad
    • Ampere
22. When a diode is reverse biased, it:
    • Conducts freely
    • ✅ Blocks current
    • Overheats
    • Becomes short-circuited
23. Basic logic gate:
    • NAND
    • XOR
    • ✅ AND
    • XNOR
24. Current in a conductor is due to:
    • Neutrons
    • ✅ Electrons
    • Protons
    • Ions
25. Function with only one output per input:
    • ✅ Function
    • Relation
    • Set
    • Operation
26. 1 Hz = ?
    • ✅ 1 cycle/sec
    • 1 radian/sec
    • 1 volt/sec
    • 1 amp/sec
27. Ideal voltage source has:
    • ✅ Zero internal resistance
    • Infinite resistance
    • Constant current
    • Variable voltage
28. pH of neutral solution:
    • ✅ 7
    • 0
    • 1
    • 14
29. Atomic number of oxygen:
    • 7
    • ✅ 8
    • 9
    • 10
30. 1 byte = ? bits:
    • ✅ 8
    • 4
    • 16
    • 2
31. The sum of interior angles of triangle:
    • 90°
    • ✅ 180°
    • 360°
    • 270°
32. Frequency of 50 Hz means:
    • 50 V
    • ✅ 50 cycles/sec
    • 50 A
    • 50 Ω
33. Logic gate that acts as inverter:
    • AND
    • ✅ NOT
    • OR
    • NAND
34. Which is NOT a programming language?
    • C++
    • ✅ AND
    • Python
    • Java
35. Which device opposes sudden change in current?
    • ✅ Inductor
    • Capacitor
    • Resistor
    • Diode
36. When capacitor is shorted:
    • Charges fully
    • ✅ Discharges
    • Overheats
    • Acts as inductor
37. Primary energy source for the sun:
    • Chemical
    • ✅ Nuclear fusion
    • Electric
    • Magnetic
38. Value of log(1):
    • ✅ 0
    • 1
    • ∞
    • Undefined