Current Electricity Physics - Current Electricity

• A
  $5 \Omega$ should be connected in parallel to $Q=5 \Omega$
  
• B
  $10 \Omega$ should be connected in series with $Q=5 \Omega$
  
• C
  $5 \Omega$ should be connected in series with $P=10 \Omega$
  
• ✓
  $10 \Omega$ should be connected in parallel to $P=10 \Omega$
  

Answer: D.

• A
  the change in the galvanometer reading is zero
  
• B
  a change in the value of the variable resistor produces no change in the galvanometer reading
  
• C
  the potential difference across the unknown resistance is zero
  
• ✓
  the potential difference across the galvanometer is zero.
  

Answer: D.

• ✓
  will shift towards right:
  
• B
  will shift towards left
  
• C
  will remain unchanged
  
• D
  will shift towards right or left depending upon the resistivity of the metal.
  

Answer: A.

• A
  $0.1 V$
  
• B
  $0.9 V$
  
• ✓
  $1.0 V$
  
• D
  $1.1 V$.
  

Answer: C.

• ✓
  increasing its length
  
• B
  decreasing its length
  
• C
  using a cell of higher emf
  
• D
  using a cell of lower emf.
  

Answer: A.