In a nuclear reaction, the mass defect is 2 x 10^−6g. Calculate the energy released given that the velocity of light is 3 x 108ms−¹
A. 9 x 10^7J B. 1.8 x 10^8J C. 1.8 x 10^9J D. 9 x 10^−10J E. 3.6 x 10^11J Correct Answer: Option B – 1.8 x 10^8JA capacitor of capacitance 25µF is connected to an a.c power source of frequency 200/πHz. Calculate the reactance of the capacitor
A. 0.01Ω B. 0.02Ω C. 50Ω D. 100Ω E. 150Ω Correct Answer: Option D = 100Ω
The current in a series R-L-C circuit attains its maximum value when the?
A. Impedance is greater than the capacitive reactance B. Inductive reactance is equal to the capacitive reactance C. Inductive reactance is greater than the capacitive reactance D. capacitive reactance is less than resistance E. Inductive reactance is greater than the...
A magnet is being inserted into a coil of wire. On which of the following factors does the induced e.m.f in the coil depend?
I. Number of turns in the coil II. Strength of the coil III. Speed with which magnet is inserted into the coil. A. I only B. II only C. III only D. I and II only E. I, II, III only Correct Answer: Option E – I, II, III...
The magnification produced with a converging lens is 5. If the object is a square wire gauze of side 2cm, calculate the area of the image?
A. 100cm³ B. 40cm³ C. 20cm³ D. 10cm³ E. 4cm³ Correct Answer: Option C – 20cm³Products
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