Advertisements
Advertisements
प्रश्न
A battery can supply a charge of 25 × 104 C. If the current is drawn from battery at the rate of 2.5 A, calculate the time in which battery will discharge completely.
उत्तर
Charge = Q = 25 × 104 C
Electric current = I = 2.5A
Time = t = ?
I = `"Q"/"t"`
t = `"Q"/"I"`
t = `(25 xx 10^4)/2.5 = 10^5`s
t = 100000 s
APPEARS IN
संबंधित प्रश्न
The strength of the magnetic field between the poles of an electromagnet would be unchanged if:
A current flows downwards in a wire that passes vertically through a table top. Will the magnetic field lines around it go clockwise or anticlockwise when viewed from above the table?
Explain the following :
Several soft iron pins can cling, one below the other, from the pole of a magnet.
In following figure, draw at least two magnetic field lines between the two magnets.
(b)
State whether the magnetic field lines in part (a) represent a uniform magnetic field or non-uniform magnetic field?
Figure. shows a bar magnet placed on the table top with its north pole pointing towards south. The arrow shows the north-south direction. There are no other magnets or magnetic materials nearby.
Indicate by crosses, the likely positions of the neutral points.
What conclusion is drawn regarding the magnetic field at a point if a compass needle at that point rests in any direction? Give reason for your answer.
Select the correct option:
Nickel is a:
The magnetic field lines always begin from ____________.
Magnetic field lines determine ______.