Current Electri...

In the network atom in figure, the equivalent resistance between the  point A and B is :-

If two resistances $${R_1} = \left( {10.0 \pm 0.1} \right)\Omega \;and\;{R_2} = \left( {20.0 \pm 0.1} \right)\Omega \;are\;connected$$ in series, then the maximum percentage error in its equivalent resistance will be

If the emf of the battery in primary circuit of a potetimeter is doubled the value of potential gradient will:-

Find the value of I ?

When resistor are connected in series what remains same.?

A long straight wire of radius a carries a steady current $$I.$$ The current is uniformly distributed over its cross-section. The ratio o the magnetic fields $$B$$ and $$B',$$ at radial distances $$\dfrac{a}{2}$$ and $$2a$$ respectively, from the axis of the wire is 

The magnetic field of $$2\times { 10 }^{ 2 } T$$ acts at right angles to a coil of area $$100 cm^{2}$$ with $$50$$ turns. The average emf induced in the coil is $$0.1 V$$, When it is removed from the field in time $$L$$.The value of $$t$$ is

If $$i=t^2 0 < t < T$$ then r.m.s value of current is 

Equivalent resistance between $$A$$ and $$B$$ is 

The equivalent resistance of fig shown between 'a' and 'b' is