Magnetic flux $\mathrm{\varphi }$(in weber) linked with a closed circuit of resistance 10 ohm varies with time t (in seconds) as 
               $\mathrm{\varphi }=5{\mathrm{t}}^2-4\mathrm{t}+1$
The induced electromotive force in the circuit at t = 0.2 sec. is 

• A

  0.4 volts 

• B

  – 0.4 volts 

• C

  – 2.0 volts 

• D

  2.0 volts