Advertisements
Advertisements
Question
Solution
APPEARS IN
RELATED QUESTIONS
Draw the electrical symbols of the following components and state its use:
Ammeter.
State the factors on which the strength of electric current flowing in a given conductor depends.
A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resistance of the light bulb is:
(a) 0.5 Ω
(b) 6 Ω
(c) 12 Ω
(d) 24 Ω
The figure given below shows an electric circuit in which current flows from a 6 V battery through two resistors.
(a) Are the resistors connected in series with each other or in parallel?
(b) For each resistors, state the p.d. across it.
(c) The current flowing from the battery is shared between the two resistors. Which resistor will have bigger share of the current?
(d) Calculate the effective resistance of the tow resistors.
(e) Calculate the current that flows form the battery.
Find the potential difference required to pass a current of 0.2 A in a wire of resistance 20Ω
Define the following:
Electromotive force
In the circuit shown in fig. 6, find the reading of the ammeter A when the switch S is
(a) Opened.
(b) Closed.
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
60 joules of heat was dissipated in a resistor when 20 C flowed for 5 s. Calculate:
(a) P.d. across the resistor,
(b) Resistance of the resistor, and
(c) Average power dissipated in the resistor.
What should I choose ___________________
b. for getting protection from electric current.
c. to measure the current in the circuit?
