Advertisements
Advertisements
Question
Study the following circuit and find out:
(i) Current in 12 Ω resistor.
(ii) The difference in the readings of A1 and A2, if any.
Advertisements
Solution
Firstly calculating the equivalent resistance in the circuit.
`"R"_"eq" =( 24xx24)/(24+24)+12=24Ω`
(i) The current through the 12 Ω resistor is given by:
`"I" = 6/24=1/4 "A"`
APPEARS IN
RELATED QUESTIONS
What actually travels through the wires when you switch on a light?
The p.d. across a 3 Ω resistor is 6 V. The current flowing in the resistor will be:
(a) `1/2A`
(b) 1 A
(c) 2 A
(d) 6 A
Define the term resistivity.
In the circuit shown in fig. 6, find the reading of the ammeter A when the switch S is
(a) Opened.
(b) Closed.
Tick (✓) the correct choice among the following :
In fig .XY is at right angles to the magnetic field. The direction in
which XY should be moved to induce an electron flow in the direction Y to X as indicated by the arrow is
Answer the following question.
An electric lamp of resistance 20 Ω and a conductor of resistance 4 0 are connected to a 6 V battery as shown in the circuit. Calculate: 
(a) the total resistance of the circuit,
(b) the current through the circuit,
(c) the potential difference across the (i) electric lamp and (ii) conductor, and
(d) power of the lamp.
Assertion (A): Electric current will not flow between two charged bodies when connected if their charges are the same.
Reason (R): Current is the rate of flow of charge.
Electric current flows through a circuit only when:
What happens when the switch in a circuit is turned OFF (open circuit)?
