Advertisements
Advertisements
Question
If a fuse contains a 5 A fuse wire and the voltage is 240 V, what is the maximum power (wattage) which may be taken from the circuit?
Advertisements
Solution
Maximum power that can be taken, P =VI = 240 x 5 = 1200 w.
APPEARS IN
RELATED QUESTIONS
What Makes an Electric Current Flow in a Wire?
The lamps in a house hold circuit are connected in parallel because:
(a) this way they required less current
(b) if one lamp fails the others remain lit
(c) this way they require less power
(d) if one lamp fails the other also fail
A cell supplies a current of 1.2 A through two 2 Ω resistors connected in parallel. When the resistors are connected in series, it supplies a current of 0.4 A. Calculate:
(i) the internal resistance and (ii) e.m.f. of the cell.
Define the following:
Electromotive force
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
Tick (✓) the correct choice among the following :
(a) A strong short bar magnet is dropped into a solenoid connected to a
galvanometer as shown in fig . The galvanometer shows a deflection to the left when the current in the coil as seen from above is counter clockwise. Which one of the following shows the correct deflection of the galvanometer when the magnet is at posi tions A, Band C.
At the time of short circuit, the electric current in the circuit ______.
What determines the direction of flow of electrons between two charged conductors kept in contact?
The flow of electric charge per unit time is called potential difference.
