A cell of e.m.f. 1.5v is connected in series with a resistor of 3Ω. A high resistance voltmeter connected across the cell registers only 0.9v. Calculate the internal resistance of the cell?

Calculate the new tension?

A sonometer wire under a tension of N10N, produces a frequency of 250Hz when plucked. Keeping the length of the wire constant, the tension is adjusted to produce a new frequency of 350Hz. Calculate the new tension A. 39.2N B. 19.6N C. 14.2N D. 7.4N E. 5.1N Correct...

Copyright warnings! Do not copy.