An inductor of inductance 1.0H is connected in series with a capacitor of capacitance 2.0μF in an a.c. circuit. To resonate?
A. 112.5Hz B. 225.0Hz C. 323.5Hz D. 707.1Hz Correct Answer: Option A A. 112.5HzIf the direction of the current in a straight wire is reversed, the magnetic field?
A. remains the same B. becomes parallel to the wire C. ceases to exist D. is oppositely directed Correct Answer: Option D D. is oppositely directedA battery of e.m.f. 12.0V and internal resistance 0.5Ω is connected to 1.5Ω and 4.0Ω series resistor. Calculate the terminal voltage of the battery.
A. 13.0V B. 11.0V C. 3.0V D. 1.0V Correct Answer: Option B B. 11.0V Explanation V/R=E/(R+r)=V/5.5 = 12/6 v = 11.0VA cell of e.m.f. 1.5V is connected in series with a resistor of resistance 3.0Ω. A voltmeter connected across the cell registers 0.9V. Calculate the internal resistance of the cell?
A. 2.0Ω. B. 3.0Ω. C. 5.0Ω. D. 6.0Ω. Correct Answer: Option A Explanation V/R=E/(R+r) 0.93=1.5/3+r r = 2Ω.Products
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