Questions asked by Prachi gupta

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• Minimum value of the quadratic equation x^2-3x+5=0 is?
  
• A wire has a resistance of 100 ohms. It is compressed to half of its original length keeping volume same then what will be its new resistance in ohm?
  
• If 3^(x)-3^(x-1)=18 the value of 2^x is?
  
• A fuse wire can with stand 0.1A of current. How many bulbs of power rating 110W/220V can be connected in series with the fuse wire, If input supply is 220V?
  
• If a proton,neutron and electron are placed in a magnetic field then which particle will experience zero force?
  
• 3 sin theta+5 cos theta=5,then the value of 5 sin theta - 3 cos theta is?
  
• The value of (sin 300°.tan 330°.sec 420°)/(tan 135°.sin 210°.sec 315°) is?
  
• 50 men can compete a work in 28 days. They started the work together, but at the end of each 10 day, 10 men left the job. The work was completed in how many days?