81) If 5 Ω, 10 Ω and 15 Ω are connected in series, then the resultant resistance R =
82) The graph between potential, difference (V) and electric current (1) in a circuit for ohmic conductor is
83) Which of the following is used to prevent damages due to overloading to the household circuit?
84) Three resistors of resistances 3 Ω, 4 Ω and 6 Ω are connected in parallel. The combination is connected to a battery of 8 V. The current in the circuit is
85) Read the following statement and indicate which law states that:
“There is no accumulation of electric charges at any junction in an electric circuit.”
“There is no accumulation of electric charges at any junction in an electric circuit.”
86) The magnetic force experienced by a charge q moving with a velocity v perpendicular to the magnetic field B is
87) In electric motors
88) A current – carrying circular coil has n turns. The magnetic field produced in the entire coil is
89) The SI unit of resistivity is
90) A conductor of 1 m length is moving with a speed of 10 m/s in the direction perpendicular to the direction of magnetic field of induction 0.8 T. The induced e.m.f. between the ends of the conductor is
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