Advertisements
Advertisements
प्रश्न
In series combination which remains constant?
(a) Voltage
(b) Current
(c) Both current and voltage
(d) Both are variables
Advertisements
उत्तर
(b) Current
When a potential difference is applied across a combination of resistors in series, the same current flows through each resistor.
APPEARS IN
संबंधित प्रश्न
Find the equivalent resistance between points A and B
Write down an expression for the resistance of a metallic wire in terms of the resistivity.
Calculate the resistance of an aluminium cable of length 10 km and diameter 2.0 mm if the resistivity of aluminium is 27 × 10−8 Ωm.
How does the resistance of a wire change when:
its length is tripled?
Calculate the combined resistance in each case:
A p.d. of 4 V is applied to two resistors of 6 Ω and 2 Ω connected in series. Calculate:
(a) the combined resistance
(b) the current flowing
(c) the p.d. across the 6 Ω resistor
If two resistors of 25 Ω and 15 Ω are joined together in series and then placed in parallel with a 40 Ω resistor, the effective resistance of the combination is :
(a) 0.1 Ω
(b) 10 Ω
(c) 20 Ω
(d)40 Ω
State how are the two resistors joined with a battery when same current flows in each resistor.
Choose the correct alternative and rewrite the following:
You are given three equal resistances. In how many combinations can they are arranged?
A given metallic wire of resistance R is doubled on itself. What will be its new resistance?
Bends in a rubber pipe reduce the flow of water through it. How would the bands in a wire affect its electric resistance?
State expression for Resistance connected in parallel.
Calculate the equivalent resistance between P and Q from the following diagram:
Six resistances are connected together as shown in the figure. Calculate the equivalent resistance between points A and B.
In the circuit shown below, calculate the equivalent resistance between the points (i) A and B, (ii) C and D.
