
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:
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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