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  1. Problems
  2. /WBJEE

WBJEE problems

855 problems for WBJEE practice, in Physics, Chemistry and Mathematics, each with a worked solution. Try each one on paper first, then check your answer.

Other examsJEE MainJEE AdvancedNEETBoard ExamOlympiadSATAPA-LevelIBAEEE (Amrita)AMUEEEAP EAPCETBCECEBITSATCMI EntranceCOMEDK UGETCUET UGGaokaoGUJCETIAT (IISER)International OlympiadISI Admission TestJCECEJKCETKCETKEAMKIITEELPUNESTMET (Manipal)MHT-CETNEST (NISER)OJEEPCAP (Python Institute)PCEP (Python Institute)SRMJEEETS EAPCETUPESEATVITEEE

Choose a topic to see its subtopics.

307 problems
Type:
1.
A student measures a silicon transistor in the common-emitter circuit… New
High School (11–12) · Transistors and Logic GatesJEE MainAEEE (Amrita)AMUEEE+23StemPy LabStemPy Lab
Hard
2.
A common-emitter amplifier is built with a supply of 12 V and a collector resistor of 3.0 kΩ… New
High School (11–12) · Transistors and Logic GatesJEE MainAEEE (Amrita)AMUEEE+23StemPy LabStemPy Lab
Hard
3.
A logic circuit has two inputs A and B. Gate 1 is a NAND gate with inputs A and B… New
High School (11–12) · Transistors and Logic GatesJEE MainAEEE (Amrita)AMUEEE+23StemPy LabStemPy Lab
Hard
4.
A thin rod of pure germanium is used to sense temperature… New
High School (11–12) · Semiconductors and DiodesAEEE (Amrita)AMUEEEAP EAPCET+22StemPy LabStemPy Lab
Hard
5.
A silicon wafer is doped with both kinds of impurity… New
High School (11–12) · Semiconductors and DiodesAEEE (Amrita)AMUEEEAP EAPCET+22StemPy LabStemPy Lab
Hard
6.
A resistor is cut from n-type silicon in which ne = 1.0 × 10²¹ m⁻³… New
High School (11–12) · Semiconductors and DiodesAEEE (Amrita)AMUEEEAP EAPCET+22StemPy LabStemPy Lab
Hard
7.
A silicon diode follows the equation I = Is(e^(V/VT) - 1) with η = 1, Is = 1.0 pA and VT = 25.85 mV… New
High School (11–12) · Semiconductors and DiodesAEEE (Amrita)AMUEEEAP EAPCET+22StemPy LabStemPy Lab
Hard
8.
A bench supply is built with a full-wave bridge on a 50 Hz mains transformer… New
High School (11–12) · Semiconductors and DiodesJEE MainAEEE (Amrita)AMUEEE+23StemPy LabStemPy Lab
Hard
9.
A sensor circuit needs a steady 5.1 V from a supply whose voltage is not steady… New
High School (11–12) · Semiconductors and DiodesJEE MainAEEE (Amrita)AMUEEE+23StemPy LabStemPy Lab
Hard
10.
A green LED has a semiconductor with a band gap of 2.3 eV, and each photon that it gives out has… New
High School (11–12) · Semiconductors and DiodesJEE MainAEEE (Amrita)AMUEEE+23StemPy LabStemPy Lab
Hard
11.
A farmer plans a solar panel for a small water pump… New
High School (11–12) · Semiconductors and DiodesJEE MainAEEE (Amrita)AMUEEE+23StemPy LabStemPy Lab
Hard
12.
The energy needed to remove one neutron from a nucleus is its neutron separation energy… New
High School (11–12) · Nuclei and RadioactivityJEE AdvancedAPA-Level+26APA-LevelIBStemPy LabStemPy Lab
Hard
13.
Carbon-12 can be pictured as three helium-4 nuclei bound together, and oxygen-16 as four… New
High School (11–12) · Nuclei and RadioactivityJEE AdvancedAPA-Level+26APA-LevelIBStemPy LabStemPy Lab
Hard
14.
Cobalt-60 (mass 59.933817 u) decays by beta-minus to an excited state of nickel-60 (ground-state… New
High School (11–12) · Nuclei and RadioactivityJEE MainJEE AdvancedAP+27APA-LevelIBStemPy LabStemPy Lab
Hard
15.
A radioactive nucleus can decay in two ways… New
High School (11–12) · Nuclei and RadioactivityJEE MainJEE AdvancedAP+27APA-LevelIBStemPy LabStemPy Lab
Hard
16.
A sample of rock contains 5.00 mg of uranium-238 and 0.90 mg of lead-206… New
High School (11–12) · Nuclei and RadioactivityJEE MainJEE AdvancedAP+27APA-LevelIBStemPy LabStemPy Lab
Hard
17.
A slow neutron, with almost no kinetic energy, is taken in by lithium-6… New
High School (11–12) · Nuclei and RadioactivityJEE AdvancedNEETAP+27APA-LevelIBStemPy LabStemPy Lab
Hard
18.
In a block of fuel the multiplication factor is k = 1.01, and in another it is k = 1.10… New
High School (11–12) · Nuclei and RadioactivityJEE AdvancedNEETAP+27APA-LevelIBStemPy LabStemPy Lab
Hard
19.
A neutron of mass number 1 and kinetic energy 2.0 MeV hits a stationary nucleus of mass number a… New
High School (11–12) · Nuclei and RadioactivityJEE AdvancedNEETAP+27APA-LevelIBStemPy LabStemPy Lab
Hard
20.
A fusion plant makes 500 MW of heat from the reaction ²H + ³H → ⁴He + n, which releases 17.59 MeV… New
High School (11–12) · Nuclei and RadioactivityJEE AdvancedNEETAP+27APA-LevelIBStemPy LabStemPy Lab
Hard
21.
A glass-maker is checking a thin plate that will be used as a camera filter… New
High School (11–12) · Wave OpticsJEE AdvancedAPA-Level+26APA-LevelIBStemPy LabStemPy Lab
Hard
22.
In a laboratory, a laser beam is split into two beams by a thin glass plate… New
High School (11–12) · Wave OpticsJEE AdvancedAPA-Level+26APA-LevelIBStemPy LabStemPy Lab
Hard
23.
A student sets up a double-slit experiment… New
High School (11–12) · Wave OpticsJEE AdvancedAPA-Level+26APA-LevelIBStemPy LabStemPy Lab
Hard
24.
A student has a single slit that is 0.15 mm wide, cut in a thin metal foil… New
High School (11–12) · Wave OpticsJEE MainJEE AdvancedAP+27APA-LevelIBStemPy LabStemPy Lab
Hard
25.
A physics club is testing a diffraction grating that is marked with 450 lines in each millimetre… New
High School (11–12) · Wave OpticsJEE MainJEE AdvancedAP+27APA-LevelIBStemPy LabStemPy Lab
Hard
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