Question
Which of the following is a reason for excessive
current in electrical circuits? I. Direct touching of wires II. Connection of many devices to a single socketSolution
One reason for excessive currents in electrical circuits is the direct touching of wires . This may happen if the insulation on the wires has come off due to wear and tear. Too many appliances on a single socket implies too much load is shared across several nodes. The current will rise much higher as a result of this.
A boat can cover 170 km in downstream in 2 hours and 145 km in upstream in 5 hours. Find the speed of boat in still water.
A boat can cover 72 km in still water and 60 km in downstream in 4 hours and 3 hours respectively. Find the time taken by the boat to cover 60 km upstre...
A boy can swim in water with a speed of 15 km/hr in still water. If the speed of the stream is 8 km/hr, what will be the time taken by the boy to cover ...
The speed of a boat in still water is twice the speed of the current. The difference between downstream and upstream speeds is 16 km/h. If the boat spen...
A boat can cover 120 km in upstream in 15 hours and 135 km in Downstream in 5 hours. Find the speed of boat in still water.
A, B and C started a business by investing in the ratio 1/5 : 1/4 : 2/6. After 6 months C withdrew 1/4 of his investment. If after 1 year from start of ...
A boat takes 7 hours to cover 266 km upstream and 9 hours to cover 468 km downstream. Find the time taken by the boat to cover 528 km upstream and 540 k...
A boat can cover 170 km in downstream in 5 hours and 100 km in upstream in 10 hours. Find the speed of boat in still water.
A boat can cover 200 km in downstream in 10 hours and 150 km in upstream in 15 hours. Find the distance travelled by the boat in still water in 5 hours.
The water in a river flow at the rate of 4 km per hour if the width and depth of the river are 8 M and 4 m respectively then how much water will enter ...
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