Advertisements
Advertisements
Question
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
Advertisements
Solution
Replacing a fuse with another fuse of higher rating wou Id al low a large current to flow through the circuit or applia nee to which the fuse is connected and thus, there is a chance of short-circuiting and the appliance may get damaged.
APPEARS IN
RELATED QUESTIONS
An electric circuit consisting of a 0.5 m long nichrome wire XY, an ammeter, a voltmeter, four cells of 1.5 V each and a plug key was set up.
Following graph was plotted between V and I values:
What would be the values of `V/I` rations when the potential difference is 0.8 V, 1.2 V and 1.6 V respectively?
What conclusion do you draw from these values?
What is the resistance of the wire?
You can given one hundred 1 Ω resistors. What is the smallest and largest resistance you can make in a circuit using these?
If the lamps are both the same in the figure given below and if A1 reads 0.50 A, what do A2, A3, A4 and A5 read?
Name two devices which work on the heating effect of electric current.
Two resistors P and Q of the same material and length but of different thickness are connected in parallel to a battery. The cross- sectional area of P is twice that of Q. What is the ratio of
(a) The resistance of P to the resistance of Q?
(b) The current in P to the current in Q?
What is the purpose of fuse in an electrical circuit?
An auto lamp is joined to a battery of e.m.f. 4 V and internal resistance 2.5Ω. A steady current of 0.5 A flows through the circuit. Calculate the
(a) Total energy provided by battery in 10 minutes,
(b) Heat dissipated in the bulb in 10 minutes.
How is direction of current related to the direction of flow of electrons?
