Question
When two charged bodies are properly connected but do
not exchange electric current, it indicates that they have the same _____.Solution
Electric current flows between two points only when there is a potential difference between them. According to Ohm’s law, current (I) through a conductor between two points is directly proportional to the potential difference (V) and inversely proportional to the resistance (R), (I = {V}/{R}). Hence, if two charged bodies have the same potential, no current will flow between them, regardless of their charge or capacity.
The average weight of 4 persons is 36 kg. The heaviest person’s weight is 26 kg more than the lightest person’s weight. If the average weight of the...
Suresh received 100, 92, 85, 97, 90 and 88 marks in his semester exams. What is his average score?
There are 4 numbers – A, B, C & D. B is 25% more than A and D is equal to average of A & C. Ratio of A to C is 3 : 4 and C is 5 more than B. Find valu...
Find the average of five numbers a, b, c, d and e such that b = 20, and a is 20% more than that of ‘b’. ‘c’ is 10 less than &ls...
Average of 12 observations calculated by a student was 60 but when he again went through his observations he realised that he took value of three observ...
A cricketer whose bowling average is 24.85, runs per wicket, takes 5 wickets for 52 runs and thereby decreases his average by 0.85. The number of wicket...
The average weight of 44 employees in an office is 45 kg. When the manager's weight is included, the average weight rises by 1 kg...
The average age of three children is 14 years. If their ages are in the ratio 1:2:3. Find the age of the youngest child.
The average expenditure of a man for the first 4 month is Rs.5000 and for the next 8 months is Rs.8000. If he saves 12000 in that year then find his ave...
5 positive numbers are written on a piece of paper. Sum of first 3 numbers is 40 and ratio of the 4th and the 5th number is 2:3. If difference between t...