Current Electri...

The colours of the rings on a resistor are brown, yellow, green and gold as seen from the left to the right. The value of the resistance is

Two metallic rings A and B, identical in shape and size but having different resistivities ρ_A and ρ_B , are kept on top of two identical solenoids as shown in the figure. When current1 is switched on in both the solenoids in identical manner, the rings A and B jump to the heights h_Aand h_B , respectively, with h_A> h_B .
The possible relation(s) between their resistivities and their masses m_Aand m_B is (are)

If the free electron density ben and relaxation time be T, the electrical conductivity of a conductor may be expressed as

The plot represents the flow of current through a wire at three different times.
The ratio of charges flowing through the wire at different times is

Which of the following set up can be used to verify the Ohm's law?

In the given figure, the steady state current in the circuit is

The current I drawn from the 5 V source will be

In the circuit (figure) the current is to be measured. The ammeter shown is a galvanometer with a resistance R_G = 60.00Ω converted to an ammeter by a shunt resistance r_s = 0.2Ω. The value of the current is

Four resistence of 10 Ω, 60Ω, 100 Ω and 200Ω, respectively taken in order are used to form a Wheatstone's bridge. A 15 V battery is connected to the ends of a 200Ω resistance, the current through it will be

When a resistor of 11Ω is connected in series with an electric cell. The current flowing in it is 0.5 A. Instead when a resistor of 5Ω is connected to the same electric cell is series, the current increases by 0.4 A. The internal resistance of the cell is