class 10 chapter electricity
Answers
ANSWER
The lamps are in parallel.
Advantages:
1. In parallel connection, if one lamp is faulty, it will not affect the working of the other lamps.
2. They will also be using the full potential of the battery as they are connected in parallel.
In this case, all the bulbs have the same voltage. But lamp C has the highest current.
Hence, for Lamp C, P = 5
60 Watt = 300 W. (the maximum).
The total current in the circuit = 3 + 4 + 5 + 3 A = 15 A
The Voltage = 60 V
V = IR and hence R = V/I
= 60/15 A = 4 A
OR
(i) The magnetic field lines produced is into the plane of the paper at R and out of it at S.
(ii) Field at S > Field at P
Magnetic field strength for a straight current carrying conductor is inversely proportional to the distance from the wire.
(iii) The current will be going from top to bottom in the wire shown and the magnetic field lines are now in the clockwise direction on the plane which is perpendicular to the wire carrying current.
(iv) Right hand thumb rule. The thumb is aligned to the direction
of the current and the direction in which the fingers are wrapped around the wire will give the direction of the magnetic field.
Explanation:
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