MEDIUM
JEE Main/Advance
IMPORTANT
Earn 100

An electrical circuit is shown in figure. Calculate the potential difference (in V ) across the resistor of 400Ω as will be measured by the voltmeter V of resistance 400Ω.

Question Image 

50% studentsanswered this correctly

Important Questions on Current Electricity

MEDIUM
JEE Main/Advance
IMPORTANT

A potentiometer wire AB is 100 cm long and has a total resistance of 10ohm. if the galvanometer shows zero deflection at the position C, then find the value of unknown resistance R( in Ω ).

Question Image  

HARD
JEE Main/Advance
IMPORTANT

In the figure shown, for given values of R1 and R2 the balance point for Jockey is at 40 cm from A. When R2 is shunted by a resistance of 10 Ω, balance point shifts to 50 cm. Find R1R23 in ohm2. AB=1 m

(Approximate the answer to two decimal place)

Question Image 

MEDIUM
JEE Main/Advance
IMPORTANT

In the primary circuit of potentiometer for rheostat can be varied from 0 to 10Ω. Initially it is at minimum resistance (zero). Now the rheostat is put at maximum resistance (10Ω) and the switchS is closed. New balancing length is found to 8 m. Find the internal resistance rof the 4.5 V cell.

Question Image 

HARD
JEE Main/Advance
IMPORTANT

324 identical galvanic cells, each of internal resistance 9Ω are arranged as several in-series groups of cells connected in parallel. The arrangement has been laid out so that power output in an externally connected resistance of value 4Ω is maximum. If n cells are connected in every series group that form parallel combination, then find value of n.

Question Image  

MEDIUM
JEE Main/Advance
IMPORTANT

In given electrical circuit, let power supplied by battery E1 be 'a' watt and power supplied by battery E2 ? be ' b ' watt then what is the value of a+b.

Question Image 

HARD
JEE Main/Advance
IMPORTANT

Find the resistor in which maximum heat will be produced.

Question Image

MEDIUM
JEE Main/Advance
IMPORTANT

In the circuit shown in figure potential difference between point A and B is 16 V. Find the current (in A ) passing through 2Ω resistance.

Question Image

MEDIUM
JEE Main/Advance
IMPORTANT

For the circuit shown in figure, find

Question Image

(i) the initial current through each resistor

(ii) steady state current through each resistor

(iii) final energy stored in the capacitor

(iv) time constant of the circuit when switch is closed.

(v) time constant of the circuit when switch is open