CBSE  /  Class 12  /  Physics  /  Current Electricity

  • 1. 
    When the wires are connected in parallel, the heat produced in the thinner wire is H1 and that in the thicker wire is H2 Then:

  • H1 = H2
  • H1 < H2
  • H1 > H2
  • H1 ≥ H2

  • 2. 
    Two equal resistors are connected in series across a battery and consume a power of P. If these are connected in parallel, then the' power consumed will be:

  • 2P
  • 4P
  • \(\frac{p}{4}\)
  • P

  • 3. 
    Thermo electricity was discovered by:

  • Joule
  • Peitier
  • Thomson
  • Seebeck

  • 4. 
    Thermo emf is the order of:

  • 10 V
  • 10-3 V
  • 10-6 V
  • 10-12 V

  • 5. 
    In the following figure represents a balanced Wheatstone bridge circuit. What is the value of X?
    MCQ Questions for Class 12 Physics Chapter 3 Current Electricity with Answers

  • 15 Ω
  • 20 Ω
  • 25 Ω
  • 30 Ω

  • 6. 
    38. The charge flowing in a conductor varies with time as :
    q = αt \(\frac{1}{2}\) βt² + \(\frac{1}{6}\) γt³
    Where α, β, γ are positive constants. Then the initial current (l) is given by the condition :

  • l = α
  • l = α²
  • l = α-1
  • None of these

  • 7. 
    In following figure shows currents in a part of electrical circuit, then the value of/(in ampere) is given by :
    MCQ Questions for Class 12 Physics Chapter 3 Current Electricity with Answers

  • 0.3 A
  • 0.5 A
  • 1.3 A
  • None of these
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