Advertisements
Advertisements
Question
Advertisements
Solution
A/c to Ohm's law,
R = `"V"/"I" = 20/2` = 10 Ω
APPEARS IN
RELATED QUESTIONS
Two resistors of 4Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.
(i) Draw a labelled circuit diagram showing the above arrangement.
(ii) Calculate the current in each resistor. What is an Ohmic resistor?
How does the resistance of a wire change when:
its length is tripled?
State how are the two resistors joined with a battery when same current flows in each resistor.
Three resistors of 6.0 Ω, 2.0 Ω and 4.0 Ω are joined to an ammeter A and a cell of emf 6.0 V as shown in the following figure. Calculate :
- the effective resistance of the circuit.
- the reading of ammeter.

A given metallic wire of resistance R is doubled on itself. What will be its new resistance?
Why are thick copper wires used as connecting wires?
How does the resistivity of an alloy such as constantace depends on temperature.
Two resistors of 4Ω and 6Ω are connected in parallel to a cell to draw 0.5 A current from the cell. Calculate the current in each resistor.
Two wires of the same length and area made of two materials of resistivity ρ1 and ρ2 are connected in series to a source of potential V. The equivalent resistivity for the same area is:
